corkscrew: Hyperion 1420i is every thing i wanted it to be. The directions leave a little to be desired but I read many posts in other forums talking about it. If you can feed it enough power You can network 2 together and do up to 28S. I've went through 8 charge cycles and am figuring out what other people are talking about. You probably wouldn't want to run 28s but it'll balance charge all the cells.

Biggest advantage IMHO to regen is extra braking and less brake wear. In hiily areas this is probably valuable. Not so much here.