RE: Welcome to Club SAITO !
Here is a bit more information on my 82a. Yesterday afternoon I took the engine out and dismantled the carb to see if I could find anything there that might be a problem. I did not find anything amiss there. When I did the valve adjustment I removed the glow plug and used a toothpick in the hole to determine TDC. I was able to wiggle both rocker arms slightly so I am pretty sure I was at the proper position to do the valve adjustment. The exhaust side (side closest to muffler) was much too loose and require readjustment. The intake side tested proper.
The engine is installed into a Great Planes Matt Chapman Eagle 580. The prop I'm using is a wood 13x7 and has been balanced before use.