I so like the housing (or two) running alongside the front of the bar at 4:00 so it/they lie inside my 2nd knuckle that I might not use pre-drilled holes. Never mind the risk. The cables run wonderfully cleanly with any lever housing location or angle and come off the bar in a wonderful smooth curve.

I have had a "sacred path" failure. (Front tire patch to hands.) The consequences were enough for this lifetime and a couple of future ones. It doesn't take a very high risk for me to say "I'll pass".