Had a little extra time yesterday and decided to start the engine. Solenoid off , ignition on, choke off, after a dozen or so flips the engine started and ran. Shut it off and turned the solenoid on. Had the throttle trim set to the max. Started again and attempted to reduce the idle speed after a short warm up, was running at 3400 rpm, with the trim was able to reduce the engine speed to 3000 rpm. While at 3000 rpm turned the slider to full positive position and slowed the engine and turned to the negative side and was able to kill the engine. I did not remove the idle stop screw when the carb was installed. Shut the engine off and removed the carb to remove the idle stop screw and reset the throttle travel.
My channel output is -100 to 100, with the slider set to add 15% this gives the ability the change the output by 0.1 %, I feel good with this.is good. I'm only guessing here but I think the carb is not as sensitive because the engine much larger than the conversions done on glow engines.
At any rate I really enjoyed doing the conversion and expanded my knowledge in the Arduino world, thanks to all that the paved the way!