I don't know what to tell you about the spare prop. I've got one, and hope to not use it, but would hate to ruin a weekend outing because I didn't have one.

The tint guy did the windows assembled, off the boat. The $500 quote was to disassemble the frames, tint the glass, then reassemble. I just couldn't justify the extra money, so I'm living with a couple minimal light gaps. I may get some black touch-up paint and hide them if it starts to bother me, but overall, I am very pleased.