If you mean the Magnum 30's that I was referring to they were awful and sounded just like a running clothes dryer with nothing in it except and old pair of tennis shoes. Used a new pair in one of my twins for a while until I could not stand the noise anymore. The were quite reliable and never quit but not my cup of tea. Changed them out on that airplane for a pair of OS FX .25.
As far as the Saito thirty thats an entirely different ball park and happen to have a new one just waiting for the perfect airplane.
As far as the op's airplane goes I think any of the .30's is to much weight/physical size. Still believe the ideal on his ship in a four stroke would be the OS FS 20, just one mans opinion.
John