How can you bad mouth something when you never even used or owned it?
What does a OS 22cc engine that no one can buy have to do with a thread about 9cc engines?
I am a big glow engine user myself, but I found the little 9cc gasser to be extremely fascinating.
They actually designed their own pumper carburetor for the engine, they didn't copy it because no one makes one that small. They had to make the carb in two parts as it is too big to fit on the front of the engine like the Walbro style carbs. Granted they had a lot of pumper carbs to use as a guide, but they still had to design it, make it etc. They even committed to having molds done for the castings too. Those molds aren't cheap to make well. Plus they needed little diaphragms made for it too. The carb us a floatless carb design with a diaphragm and little fuel inlet valve in it too. The pump of course is separate.

Years ago, i remember someone at the flying field was bad mouthing some engines and espousing his views on the others as to which engine was best. He also went on about how bad Fox engines were, blah blah blah. So after I finish another flight, as I wanted to fly not talk, he loudly tells everyone that they need to use engines like what I use, as those engines are running so good. But he then asks me, "What brand engines are you using, I don't recognize them"? So I look at him hard, and reply, "All the engines here on my planes are Fox engines, I only fly what works." He stood there shocked, and shut up after that. I don't think I ever saw him at the flying field again while I was there either.

My main problem with the little 9cc gasser engine was I was still thinking glow engine instead of gas engine. it does not behave like a glow engine, it behaves like a gasoline engine. So I had to get my brain working correctly for a gasser engine again. Years ago, i quit flying gassers when the gasoline formulas changed and the fuel started stinking or smelling real bad. i really can't stand the modern gasoline odors as it tends to make me nauseous. Plus my family almost causes a riot at home if I bring a gasoline engine inside to work on it for whatever reason, not just RC engines but trimmers, etc. The gasoline smell just lingers on everything and you can't even get it to wash off the hands well either. But when i discovered I could find some other gasolines that didn't have all those noxious aromatic hydrocarbons like today;s gasolines use, I became much more interested in having a go as gassers again.