Mr cox the engine is nicely made, compression is good came up after 15 minutes and no lateral or back and forth slop on the crank, the venturi on the carb seems very small and
they may have the port timing off, the small carb would be a plus as a diesel but if it cannot get a good charge in the cylinder will never scream., think they have a design issue
The reports in the 1/2a forum were not impressive, the only thing going for it is a very nice strong rod

MY AP hornet 09 conversion turns 12600 on a zinger 8x4 (just had to toss that in). Guess in that 07-10 range conversiona TT10 and OS10s still rules
With the success of the other TTS the 07 does measure up martin