I have a couple of Olympics. The last one was in great shape and flew it one season on a Ramrod 600. A little too much model for the engine.
But I stopped using it because after a short time there were aluminum shavings in the crankcase from the engine running backwards too frequently. Anyhow the crankpin shaves off the backplate and pretty soon the reed retainer falls out because of the loss of material.
Anyhow it is a good running engine for awhile.
I flip started it, so it would frequently run backwards. I think you would find the same problem using a starter with the starter pressing the crankshaft rearward.
Stick with the greenheads or Max engines in Nos for this size.
I will be bringing a bunch of excellent green heads to the NATS for the swap meet. If you need any before that, let me know, and I will send you a list.