OS and ST have been my go to engines For a very long time.
For four stroke sport flying, just can't seem to beat a Saito. Sound so good and simply work every time with out dead sticks when broke in, tuned right and fuel tank correctly located. But then the same could be said of OS. Have not tried Magnum or ASP four strokes yet. Might someday.
But I would sell DAVE for enough to buy 3 Saito .30s. Oh wait, I don't think I could get that much for him.
I loved Enyas When I was a kid and control line flying. Never like Fox engines. Nowadays I only run a throttled engine for control with 2.4 rc on it. I made a Control Line handle with a throttle trigger on it, and quick change lines bar so the handle works with any lines and plane. Spectral lines.
Hey Dave you still fly any of your control lines?
Ken