Mutt,
Since you have settled on Heidt's as a potential supplier have you called Heidt's tech line or e-mailed them from their Contact Heidts? I've found that when you get into specific questions about the products going to the source can save lots of grief. Another information source may be ..::FatmanFabrications::.., even if you're already sold on Heidt's kit approach. If you get it figured out post the answers so we'll all know for the future.