I write with my right hand, so it made sense to learn to use the mouse in my left hand. (Just watch someone making notes off a screen - repeatedly putting their pen down to use the mouse then pick up the pen again. Not productive.) Works well with standard mice, but newer mice are designed for the right hand. Any recommendations on left-handed mice?

I've repaired CD's that suffered grit scratches, gently polishing with Brasso and a soft rag. Scratches don't need to be removed completely. Wash disk with dilute household detergent to remove all traces of Brasso, dry and try disk. Repeat several times as necessary, just be patient. Best of luck!