I just picked up my block today after a 3 wk wait. I had John Edwards talk to CP Piston's tech support to get the right ra numbers for their rings. Cosworth's tech support also recommended an ra of between 20 or lower for the deck surface to have their head gasket seal correctly. So this was the goal when resurfacing the top of the block deck. John also checked the mains for straightness. The crank was sent out to have a .001" clearance on the rod journals. He also balanced the whole rotational assembly to 1/2 gram.
Here's some vids of machinist I used, John Edwards from Costa Mesa R & D in Orange County, Southern California:
Honing an STI block
YouTube - Subaru STi Block Honing
Here's another vid resurfacing a Subaru SVX block with sleeves:
YouTube - Subaru SVX Sleeved Block Resurfacing
Here's another of his custom 6 qt Subaru oil pan:
YouTube - Subaru Aluminum Oil Pan, etc...