Finally cranked up enough courage to drill the hole after rigging up a fixture to position the tip of the 6" long, 1/8" dia. drill. Drilled the hole about 7/16" deep and tapped in a piece of hard piano/music wire. Here's what it looks like before the excess wire is cut off:
I was surprised how easy the drill went into the slide - maybe due to a new can of Tap-Magic. Will see how it holds up during a little 900 indoor match this weekend.
Regards