For those of you who are more electriclly skilled

, I found a guide on how to build a 13.8V, 40A Switching Power Supply (originally meant for Ham radio).
http://www.qsl.net/xq2fod/Electron/PS40/PS40.html
This is an advanced project, as he winds his own transformers, etc...
Figured I'd post it for anyone who might be interested.