Decided to break down the engine and replaced some orings and used a very thin film of high temp silicone on all parts, back plate, carb. And bought a new throttle stop screw. Guess what, runs and idles like a dream, screams at top end and temp barely reaches 270 f. I'm glad I did this instead of burning it up. Its not as fast as my Revo or Savage with a XTM 457 in it but its now reliable, runs good and honestly handles very well. {probably because its slow} oh well this is all an obsession cleaverly disguised as a hobby.
Thanks to all for your input.
Keester