I was sitting in front of P427 thinking about what other details I could squeeze in it. Then I thought why not try to put some springs in the suspension? The first thing I obviously thought about was to find and use a real small spring. But where to find a spring in the right pitch, thickness and diameter? So that won't do. That's when my overhead light came loose and hit me in the head, and I "saw the light" (literally). Why not use some "make-believe" springs with colored wire? And I had the perfect wire for that.