About the bearing issue.. I know not a 65ax but I have a 46ax that ate part of the rear bearing cage. Was running it on a macs pre-tuned pipe and 15% wildcat 18% synthetic oil. Propped with 11x7 and 11x8 ma @ 13,500 rich. Some with 11x6 ma @ 14,800 Upon disassembly I did notice the cage had corroded some, I probably forgot to run it dry once or twice but never ran it lean. Now It needs new bearings and a piston/liner. It's peeled and scored. I'll fix it with some Boca's stainless or ceramic? Are the ceramics rust resistant? I'm keeping and fixing it because it was a great engine and really fast on the pipe. Not to mention I can't get a Japan 46ax anymore.

I'm dying to try some different props on the 61fx Kaos. LHS doesn't have APC in 11x7 and 8. It's broke in now with 15 flights on it and seems to be running out of gear with the 6 inch pitch. Tried a 12x8 apc I had and was a dog way to bogged. Like 10200 on the ground and a slug in the air. MA 12x6 K is pulling about 12,000 on the ground with baffle removed and Wildcat 15. I'm loving the Killer Kaos though. Why did it take me so long to get/build a classic pattern plane? I'm watching this thread coz I've been eyeballing that Novarossi 13 engine too. That thing with the black engine and pipe slung down the side with the gear up would look so cool screaming by. :-)