Not really that I can remember, I burned a motor because the cooling tubes got tangled with the out-runner! 
They were out of stock that time ( 2 years ago), anyway, I ordered Fightercat 500 class outrunner, the problem is not the clamp but there is NO real estate on the front of most of the out-runners. Venom 's out runners were made to use the clamps. I had to wait until they sent me stock motors.
Assuming that you want to up grade to another outrunner.


Assuming that you want to up grade to another outrunner.
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