Jack: That is looking much better! I'm not good with the Team Cosmos calculator either, but I did a quick calculation for a 1000mm x 100mm x 18mm Hardox bar (which weighed about 14.5kgs) at 1500rpm, but it only came out at about 15kJ, which isn't that great. If you doubled the speed to 3000rpm, you would get about 60kJ, which sounds good to me. I guess it depends whether you want more power or a faster spin-up time.

Cory: Cosmic Revolution is coming along nicely. If you follow Joey's latest suggestions it should be quite good.