RE: You might be a Kitbuilder if...,
...if you instinctively, back-up at least 3 steps when you hear an Xacto rolling off the bench.
....if have spent hours chewing Ambroid off your finger tips.
.....if you can tell w/o measuring what the thicness of the would you are using is.
......if you have boxes and boxes of used wheels, control horns, spinners, nut & bolts, etc.