I've seen the 5/16 hex on a HEMI pump drive break more than once but for the first time for me I broke the Mag drive slot (not the mag base) in the pump drive. The combo is a 525 blown/inj HEMI with a Mag 3. The mag and base turn as would be expected. This was not a New drive but a used, I don't remember if it came with the blown parts I purchased years ago to build this motor or one I had for previous applications. That being said is this typical of a drive used with a mag (first time using a mag) or has someone experienced some other issue creating this warning sign?