I think the stage 1 stage 2 idea is not good in the long run. You end up spending twice as much on shipping (Yes they charge the same amount to ship stage 2 as they do for stage 1). And it slows down the build. Also I bet that there are more unfinished stage 1 projects out there then unfinished complete package projects. Without the exhaust, trans-tunnel, grill and steering wheel ... almost not worth trying to go-kart. My advise to anyone thinking about doing a build... save your money until you have enough to get a complete package... there is only 8 boxes in stage 2 and your body. "Project Time" is the most valuable resource don't waste.