I got a little time yesterday between all the packing and stuff, and was able to get the new Wiseco forged high comp piston and a spare cylinder packed into a box and sent off to Bore-tech for a bore/hone, silicone carbide treatment on the cyl wall, bead blast and paint the outside of the cyl, and also have the piston treated on top and skirts with temp coating and slippery stuff.
All of that should reduce friction & heat significantly.
Besides,
REX will now be 694.64cc. Adding the cc's raises the comp to 9.05:1, but this piston has a raised crown (2mm) which should bring the comp up to at least 10:1.
With this added to the higher lift camshaft,
REX should have a bit more muscle on his bones.