Hi Steve,
If it's a C/L version of the TT10 then the only thing wrong with it is that the Venturi has a larger diameter opening then is optimum for it's size. That is easily fixed and you will have a great running motor.
Incidentally you can not convert the new natural OS LA 10 RC motors to C/L with an FP backplate,venturi and NVA. They don't fit anymore Of course the old La might not have been convertable either. Inever saw one till today. Pity.
Dennis