DMS-1 The King's 4th Pitbull build

[McCreed]

I have a 6" x 1/8" (150 x 3mm) bit that I use for doing those. (from the BGS)

They're good because the extra length of the bit allows a decent angle without the drill chuck hitting the top of the body.

I'd love to have right angle drill though.

edit to add:
Should have included that in lieu of a right angle drill, if you have a rotary tool that has a flexi-shaft attachment (my Dremel does) it can be very handy for this application. You have to use the lowest speed setting though, or the long bit gets a bit unwieldy.