Here’s an end shot of the grip placement in progress, with the D-ring already attached.
I learned a fairly painful lesson about using the correct tools for the job on the D-ring assembly. When drilling metal, use either a Titanium or Cobalt bit, which will go through the metal tube easily and quickly.
Do NOT make the same stupid mistake I did and try a typical steel bit. The bit snapped, and I wound up with the broken bit shoved into my left hand.
Amazingly enough I managed to miss all the important bits in there. A few dozen Band-Aids, some Neo-Sporin and a tetanus shot later I am 100%.