Thankfully I have a bit of room... and an understanding wife, ha ha. Mind you, I'm sure she thinks i'm slightly crazy playing with my bats on the weekend!
Assumed it must just be a feel thing, and guess that makes it a much more skillful process, judging the right pressure for each cleft.
Yes, had thought about running it on a cog and chain. Had planned to dismantle the wifes bike when she wasn't around, ha ha, but not sure if I'd have the stregth to be able manually drive the cleft through at the required pressure. I'm assuming that if you put up to 2 tonnes of pressure throught the roller and onto the bat face, it would need some serious strength to pull the cleft through, but not really sure!