My second Pinewood Derby car. Basically is a sketchup model that I modified to work within the parameters of that little block of wood. I went ahead and created this one as an 1/8" shell that goes over a companion pinewood car.SketchUp is a must if you want to build this...it has the info for the cuts for the pinewood portion of this build.I printed this with PLA, Full support and raft. Not sure that it matters about the fill, but I think I had it set at 15 or 25%.I am supplying the sketchup file, an stl and a repaired stl repaired in netfab.