Burning up twin tails?

Hello! Great forum, I've loved it and learned a lot.

I have the dual tail set up on a BL MCPX but I seem to go through tail motors with some regularity, about once a month. Anyone else seen anything like this or have suggestions? Is there another motor I could use? Other than the SR120, it's too heavy.

I bought two brand new tails and even tried two main motors (right side) out of a MCX, which I read somewhere that it's the same motor as the MCPX tail. But the same effect, they don't hold after about a month and I have to get n$w ones.

Thanks!

John