Originally Posted by Bungholio
When you say it wont tighten down, is the hole too small? I bought the same type mount for mine but it was for powerlet socket and it was slightly undersize. Sanded out with dremel and it fit fine.
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The hole for the key is the right size, it is just too thin of material like there needs to be a spacer in between the stock spacer and the collar on the top.