I did some additional testing on this engine.
Flipping the prop by hand Im seeing 38psi, when I throw the starter on it Im seeing 58psi.

I want to go ahead and break in my new .46fx and test it but I wont be able to until later in the week.
It looks like the old .46fx is toast though, and I did subject it to a few lean runs when I changed props and did not re-tune.

My other .12's and .15's all tested the same with the carb open and so forth.
The .12 is going back because I have owned several MT-12's and they would still get stuck at the top of the sleeve with almost a gallon through them.
THis new MT pushes over with no problem and I only have a few tanks through it. The first tank I ran with needles set for blubbering did not go well, temps got up to 220 to 230 on idle, obviously something wrong with the engine.
Anyhow I described the problem to Mugen and they said to send it on in.

Thanks

Dbow