That's interesting about the lifter bore, I haven't take mine apart enough to see that. Maybe I'll put a nipple in the rocker cover to let it breathe. Without some way for the gasses to get out, I have doubts about how much oil circulates. The manual is explicit in saying not to run it slobbering rich during breakin, otherwise damage will result. I would expect very rich with an unseated ring would result in a lot of accumulated fuel in the crankcase, and with not much of a way to get out it would lead to problems.

It still surprises me everytime I look inside a new OS FS, that it has little to no lube in it. This one had no oil at all on the cylinder, or rod ends, the cam and lifter box was lubed with grease in this one, something I haven't seen before. The cranks rubs the backplate, but it might not be fully seated in the bearing, I haven't checked yet. I did read that the FS-30 liner is a drop in. I have a several FS-26 I may borrow a crank to make life easier.

For those interested I found this thread.

http://www.rctech.net/forum/showthread.php?p=1202390

This project is a couple months out, but I'll update when I have it.