I own a Saito 82 (4 stroke). I bought mine thru Donalds Hobbies out of Texas. No sales tax, no freight and it was discounted.

The engine worried me at first however now that it's broken in I have become quite fond of it. So much so that I have also bought a Saito 56 and 125.

I don't see how you can escape the oil issue. My 82 is mounted upright in a Senior Telemaster. I have the muffler aimed away from the fuselage and down but there's always a little oily sheen on parts of the plane (not much though). If you watch that exhaust stream coming from the engine it's amazing there isn't a whole lot of clean up to do after a flight.