Again, many thanks brutus for good advice.! I will remove the return spring since I think it is a bit too strong thereby unnecesserily straining the throttle servo..!
You are of course correct that there is no guarantee that the engine will stop if throttle barrel is closed. Mine presently does stop but you never know??
At the same time I wish to pick your brain on my new throttle arm added to the carb. Here is why:
1) metal arms is a no-no to me
2) the arm is too short
3) the angle of the arm is not optimal for precise low speed throttle control. High speed control is not critical as you know.
See attached pic showing my modified Lexan extension added to rectify the above drawbacks. Viewpoints very much appreciated..!!