I'm sorry you and Cox engines didn't get along. I had countless .049s as well as numerous .020s and 1 .010. I don't recall issues with any of them. It was Cox that got it all started for me. There must have been hundreds of evenings and weekends with Cox control line planes (and one no control Tonka jeep with an 049 bolted to it's grill.) All that led to the next step which was control lines kits then RC Kits. Cap that with the great people I've met and my experience as a beginner was terrific.

Cheers

Gord