A British guy named Robert Keeley used to mod pedals for Steve Vai back in the day, and he still does all the same stuff as well as sells kits for DIY guys. There's a really good sounding DS-1 Mod that he got famous for... and if you can make that thing sound good.. I'll at least check out your others. I think he's making his own pedals now too.
www.robertkeeley.com