Ultrastick Evolution 10cc First Start

This Evolution 10cc gas engine hasn't been started since I crashed the last Ultrastick back in 2021, some 5 years ago (damn, has it been that long?).  It hasn't been my favorite as I find the single needle carb a bit of a challenge to get a safe idle out of, but it's a good smooth running engine.

Today I installed the RCexl Opto Kill with BEC, and it lit up perfectly.  It's plugged into the gear switch, and the kill works great. 

Filled the tank, powered it up and it started on the first try! Spent hours today trying to find a decent idle, as setting the high is easy. Managed a decent run up, but at idle it tends to idle high and drop off, settle, then after about 20 secs stall out. I don't think it should do that. 

But IT RUNS! After a few hours, I am giving it a rest. My understanding of gas engine tuning is rudimentary and I tend to waffle around settings. Part of my issues is I don't know quite what is acceptable. My goal is a low enough idle to not create roll away thrust, and not quitting.

We'll get there.  For now I consider this a win.

I am thinking the 12x6x3 is too much prop and may be causing my tuning issues. I need to check inventory, but Gemini thinks a good 3 blade is 11x6x3. For now I threw on a Xoar 12x6. On Tuesday we'll see how this does. In further discussion with Gemini, I think I will be going with the Master Airscrew Scimitar 11x6.

UPDATE: While discharging sime batteries I never got around to flying, I ran the Xoar and it scared me how many rpms it must have picked up, it was insane. It also found a great idle, likely as it didnt koad up and the smaller prop produced less thrust. I can't imagine what the 11x6 will do... EVO manual says 12x6 is the recommended prop, Gemini sees that but thinks the 11x6 will be a better performer. I agree after reading the arguments