well, it was being renovated...

It's kind of like being accused of vehicular homicide, and being denied riding the city bus, if you weren't incarcerated of course.

Before 3d printers, people that wanted a cheap and lousy gun without buying a real one would just assemble one from some metal pipes and other junk, the old Saturday Night Special, Zip Gun, or Junk Gun.
As to passing through metal detectors, who really cares, after all anyone that can't afford a real gun from illegal sources isn't going to be going into the areas 'protected' by metal detectors.

100cm = 1m
1000m = 1km

That would be 31.2 km.
Of course, as you pointed out, that's a very short distance between coasts, so which two coasts are we talking about here?

Using Youtube to store your files is like using your neighbors car for storing you beer without asking. Odds are that one of these days it won't be there when you really want it.

Black powder is an ancient explosive, not to mention easy and cheap to make. We even did it in one of my science classes.
(Sure, that was back in the 80s when chemistry in a science class meant you actually mixed and tested various chemicals instead of just watching a video on the structure of polymers as it pertains to the plastics industry, but still.)
Also, gunpowder is not that powerful, and there are plenty of others with more bang that are nearly as easy to make.

Bet those sensors go absolutely berserk during July. :p

Of course, if someone wanted to cause trouble, just toss a handful of power into the wind blowing on a crowd anywhere they have those sensors.
Any security system that can be so easily swamped with false positives (the false positive is not that the gunpowder was detected, but rather that they were a threat, had anything to do with it, or had any knowledge regarding it at all.
And that's assuming it's only going off on gunpowder, because if it goes off on sulfur, even an egg salad sandwich or certain types of antibiotics could cause a lockdown. How many of those will occur before someone realizes that trying to detect a common element is not security.

You're better off using modern replacements for actual black powder, since the corrosive effects of that old sulfer charcoal saltpeter stuff is pretty nasty over time.

"It works and gets the job done"
Yay! Always a vitally important thing to all projects.

"but it's far from elegant"
Define elegant. Also, is elegant a project requirement, or asset, or is it just a personal affection?

"numerous little (some might say trivial) mistakes everywhere"
Those are a problem. Mistakes are always problems, but they do occur.

"Diagrams that should be spread over five or six pages are crammed onto one, naming is totally inconsistent, and so forth"
If it is within your power, have a documenting standards and policies instituted and enforced for everyone.
(I removed the "arrows point the wrong way but doesn't affect anything" because that's an error thing.)

"Much of this is because he is so busy and just wants to get everything out the door."
Out the door is what everyone wants, but if the issue is because he has too high of a workload, either redistribute the workload, get more help so you can redistribute, or obtain more time for the project. It's well known that too much work in too short of a time with insufficient resources results in errors and a net loss of productivity. You can have it cheap, good, or fast, but you can't have all three.

"What is the best way to handle this?"
Not enough information to properly answer this, but please see previous comments and questions.

"I spent a lot of time refactoring some of it"
Is that necessary, or is it your personal choice? If it's necessary, there is a problem. If it's your personal choice, find out why are feel you need to do that, and re-assess the decisions you've been making. I know, it sucks, but it may have to be done when.

"as soon as he makes any changes it needs doing again and I have my own work to be getting on with."
Ok, earlier you said you don't like how he does it, but it works as intended and required. So why are you redoing it again? Does it not work, is it below the required standards, what? You need to justify why you are wasting time doing someone elses work. Are you just covering for him, or is there another reason? You really have to try and think about this one.

"I submit bug reports and feature requests, but they are ignored."
I'm sorry, but welcome to the modern practices of "if it's good enough, get it out the door and we'll fix it later, if we have to" attitude that infests most companies.anymore. And don't worry about the fact that when the customer base freaks out over a serous bug that was found and ignored by the higher ups during development, they will undoubtedly lay the blame on you, despite all the documents to the contrary. (Find a way to legally keep a copy of the bug reports or submissions where you can access them if some kind of legal repercussions occur due to such circumstances.)

Thanks. That looks and sounds like what farmers have been using for many decades now, possibly longer.

Well, they could always try to engineer an alternate source of energy. Of course, that may end up with a plant that need to eat stray animals every hour or so. 0.o

The name is derived from Lucifer, the root of which means 'light-bearer' (lucem ferre).

Plants? Ok, how about potatoes, that way they could make them into chips, get high and solve the munchies problem all at once. :)

So long as we're at this, do it to cows also. Not for the burgers, rather the milk. THC bearing cheese on the burgers, and THC milkshakes. (Talk about happy cows.)
Then you could make a fast food place specializing in stoner food.
I can imagine so many bad jokes along these lines, but I'll leave the rest to your imagination. :)

Correct.
Anybody can claim to be running a contest to name anything, legality not withstanding, however, only the body/organization that is internationally recognized as the valid naming registrar can actually place or change names. In this case, it's the IAU (International Astronomical Union).
Uwing claims they didn't say they were sanctioned to do so by IAU, but then again, they didn't say they weren't, and most people will assume that you had obtained permission to do something you are taking money for unless you say otherwise. To not point out that it is an unofficial name choosing, is the first sign of a scam.

Another thing, if you see anyone wanting money for ANYTHING not within the confines of the Earths Troposphere, it's about 99.999% probably it's a scam. You won't get any property, rights, or official naming of anything. There are international treaties that cover a lot of this stuff, and one of the first rules in that whole thing is if you don't have people their, you definitely have no rights to sell it, period. (Even if you do have people there, you still have lots of limits on what you can do.)

By the way, horrible name choice in my opinion. Nice to honor your grandfather, but still, that name sucks.

Science Fiction can be very good at inspiring kids interest about science. It's lousy at teaching real science in most cases, because the ones that stick to 'hard science' tend to be boring, especially to an 11-14 year old.
There are a lot of books that would be a good fit, but it's going to be a while before I dredge up the names. It's been so long since I read them.

As a side note, having class discussions about the science involved in the fiction they just read is a good thing, and helps them relate it to real science, even if it does go into the speculative at times.

Agreed. Some morons do reprehensible harm to research that would have helped many people, and cause the death of many of the test animals, all for the purpose of opposing a completely unrelated dog breeding facility that's in a different city.

I'd rather use some harsher descriptions than morons, but we'll leave it at that for now.