a 24v drill on 22v should be ok on them. I've run 12v drills on 24v through an electronize without issue before. Granted that was with 100mm blue wheels. If you're planning on running the big wheels in bitza, unless they're not grippy at all you might overdo it.

Of course, you could just do the external relay modification on the electronize and for the price of 4 30A car relays have two 30A controllers.