Looking at that now, I'm having second thoughts. My "Plan A" of butchering a cake tin seems inadequate now looking at the precision that's gone into this. Buying the chassis puts the amp part of this project around the $250 mark. Throw in a speaker and materials for building the cab and we're getting well north of $300 - which is about what you'd pay for a ready made 5w amp (well the Pit Bull one anyway).