[bobmorey]

I've used the Sabertooths for other projects. Usually they work fine, but I think the 2X5 would be a bit underpowered for what you want to drive tracks and a servo or two. I'd use a bigger one 2x12. As 9W Monighan pointed out, the receiver get its power from the 3 wire plugs going into the receiver - one of those wires (red) is power. You should not need a separate battery for the receiver. I did have a case where I was using a 2x25 for a tank project - and either the ESC was underpowered (wasn't according to their specs) or the thing was defective. It would not move the tracks at all consistently, so I traded it for a 2X60 and it works fine.

I use a 2x5 like that to power a 12V turret rotation motor and it works ok. I power the 2x5 from the main track driver 2X60.

Awesome little dozer conversion though! Love it!
B