Not such a great machine (Score 1)

IIRC, this has been around a long while under the name 'Roswell Flyer'. What you find is that while cheap, it's not terribly efficient. These types of configurations have severe limitations as far as their endurance as well as range. There are other VTOL configurations that are significantly better. For example, a 7 oz. VTOL tilt-wing machine that only uses two rotors, can hover for 3 minutes or fly forward up to 40mph for up to 15 minutes, and has a wireless camera on board. (It takes a lot more power to hover on the props than to get lift from the wings.) There's the 1.5lb. VTOL that is flown from a dual mode camera (video/IR) using LCD display goggles. There's also work underway to get a 1 hour battery powered VTOL UAV that can fly autonomously. BTW, the small piezo gyros are rate gyros and don't do diddly for slow drift - meaning that you can roll completely over uncommanded if it happens slow enough.