Personally I do not see much difference between OS and Saito. I have flown both and they are both very dependable engines.

Unfortunately the cost is about the same.

I have had limited experience with Magnum engines, a 4 stroke 70. Mine works just fine and cost a lot less money. Some people hate them but most say they are fine.

And there is just something about the sound of that 4 stroke on a fly by, ;-)

Tom