Avs2 650 tuning on a 340

I'm not sure what you mean here. I'm trying to do everything I can that is being recommended to me. I'm still learning. I never said I won't use a piston stop. Just dont have 1 at the moment.
I'll be looking into checking over the timing this week hopfully and will report back. Had to order it so it will take a few days

I mean it's that important to use a piston stop. Anything else is just a guess. I thought that was the clear message. Does that clear it up further?