Being in the Glow Engine Forum a lot, one would get the idea that Saito is number one?

So I was nosing around in the market places and taking counts of engines for sale to confirm my suspicion.

There were almost four times as many Saito four strokes as there were OS four strokes

There are still twice as many OS two strokes out there as Saito four strokes

Also from my visits to several model flying sites in the Eastern US, everything may be (In what I would call extremes), almost exclusive OS and others Saito.

I didn't look into the ASP/Magnum/SC situation nor did I look at Thunder Tiger.