I had my maiden flights on the OS GGT15 gas/glow engine powered GP Escapade 61 today. Both the plane and engine performed very well. The engine ran with out any issues and had good vertical. I think OS has a winner with this new glow/gas engine configuration. The power seems about the same as an OS .75 nitro engine. The only issues remaining are dependability and longivity. Only time and use can answer those questions. I am quite impressed with both the plane and engine.
Best wishes and good safe flying.
Heli-NuBee (AKA Roger the radial rabbit)