I owned a (older, but new) Supertigre 3000 and wound up putting an OS carb on it. It improved the overall engine operation, but I had very inconsistent results trying to get the darn thing started (by hand). Often I would just give up trying to start it. I sold it and bought a Moki 1.8. It starts every time (flip prop backwards against compression) with one or 2 flips. The Moki is more consistent in overall operation and I believe has more power.