I have convert only one
The owner is the typical guy used to fly hours, he flies a cessna, he add additional fuel tank and his record is tree hours..
He bought previously the saito 36 fg, he says saito converted is same ore better. This saito converted has more than 40 hours fly. I
Excellent idle and excellent power , I dont remember well but I tested it with a 20X10 prop and around 6000 rpm Ill check it.

I recommend a lot convert saito 220

Regards Max