World Models Ultimate 120s
The mount is one of those glass filled nylon adjustable jobs. It's very sturdy, with large webs running down the side of the beams to give it strength. I'm still not sure if I'll end up using this mount instead of the alloy one I bought. I'll run the engine on the model first to see what it looks like. If it's too flexible, I'll mount the alloy one before I fly the model.