Opinions on gliders

[Running rough]

Aperently the austrailin cm2250 engines do not seem to have the liner issue of their epa North American cousins, but their 2250 has the shim under the liner from the factory and has a 17.1 compresion ratio, but they have injecter cup cracking issues, I was told thier most reliable isx is the original cm570 but I am asuming with the updated overhaul kits