We it looks like I have a joint effort going.
Mine should be done by next weekend and 2 friends of mine are building one.
We haven't received their cases yet. but we are doing the cranks for all of the this week.

I'll have $100.00 in mine with the 23.6cc cylinders and they are building with the 21cc.
It looks like they will only have to buy the rear bearings, so they will have about $80.00 in theirs.

I hit up 3 echo shops and got 6 engines for free and purchased one for $30.00.
All of the cylinders were good, a couple were excellent.

I know some of you have theirs running.
Any problems? What size prop and how many RPM's

This is turning out to be a fun build.