Nay, for a 44.4V 20Ah package, you need 8 of those cells I posted. 4 of those RC packs @ 22.2V 5000mAh, would have to be broken up into two 44.4V 5AH packs. Then connected to double the volume to 10Ah.

Check the link in my original (top) post. You'll see what I mean.

I have avid BB7's on the trike now, with 185mm rotors. Braking should be fine for the two hills on my commute (Literally downhill and uphill in the same ride, might as well throw snow at it too). The hope with Regen though is that it would help retain that same level of braking after I strap 40+ lbs of motor and battery to it!