Good morning Tony :
You're doing GOOD, see, you already got one good answer.
Because I chose to not mess around with engines, out of my league, I have always sent mine up to a man in Connecticut. You get the engine back, returned to brand new condition for a very small amount of money. He has done many for me and I find it very convenient.
You can ask for a price quote.....
B.J.'s MODEL ENGINE SERVICE
Repair. Tune-up, Overhaul. Crash Damage
All makes & sizes. 2 & 4 Stroke. Gas & Glow
or go to :
www.starcomposites.com/BJModelEngines
In fact, the Magnum .80 on the plane that took your Glider up, was redone by him.
There is no better place.
RICK