For those that like the building aspect, do you prefer having to lay down blueprints, cut pieces, and measure lengths or are the kits that are pre-cut and easy to assembly preferrable? I realize they may take away some of the "challenge" and so the hardcore builders probably would rather do most of that work themselves. There are some kits out there that are like puzzles that you just need to assemble - no cutting. I think it's cool - but it does take away from the "this is my own plane" factor knowing everyone else with that kit had the same pieces and just assembled them.