Short update:
Custom bearing cage design is complete. Machinist should have those done by 2/15.
Still have to order magneto, wires, trans gears and primary drive parts.
Decided to go with piston coolers, not so much that the pistons will need cooling with E98, but I'm concerned the cylinders might get oil starved at the piston speeds we'll be operating at.
Also, the rollers tend to slide around the crankpin oil holes at high rpm as there's too much oil there. The sliding makes for flat spots on the rollers and premature failure. To alleviate that, I'm machining slots fore and aft of the oil holes- about 1/8 long and .010 deep to encourage the oil to spread out away from the feed holes. That's a FAFO experiment. Seems to make sense though. We'll see how that works out.