I've done it, too. Pat Aherne (another cop and M4C member) has seen the work. It's flawless.
Simply, I used a Starrett punch to start where to drill. I used another pre-drilled lower to measure how far the drill bit needed to go and taped off the bit so I knew when to stop. I went slowly to be sure I was level on both the X and Y axis.
I used the punch again to locate where the oil/drainage hole needed to be, after measuring against the other lower.
I selected my drill bit based on the size of the hole and used a cordless Dremel tool. I placed the lower in a Brownell's lower receiver block and placed it in the vice. I went slowly and it took me about 15 minutes all told.
I used the front detent pivot pin tool I got for a course at Lassen School of Gunsmithing, and installed the detent spring, the detent pin and the pivot pin.
It came out perfect, and it was easy.
If one doesn't feel comfortable doing it, then don't. Be careful about calling BS on someone, because the truth is, it's not nearly as hard as some make it out to be.
Just because someone else can't or won't, doesn't mean it can't be done. Further, if I can do it, most anyone with confidence can, too. Yeah, maybe it took some stones -- maybe it didn't. Bottom line, it was easy, and I would do it again.
It's not rocket science and it sure ain't brain surgery.
YMMV


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, but I don't want to tackle this. None of the guys want to mess with it either. I think I will have an expert take care of it.

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