What does this have to do with felt pads? Or are you just Mr. Negativity?
I’m always positive -
Take your time centring up the plug, I used a small set of dividers to find the centre of plug before centre punching. Eyeballing it is a bit hit and miss.
Drill your pilot hole.
On plugs that size go straight to the tapping drill, don’t bother with intermediate drills. Take the edge off the drill slightly with a small emery stone or a small file.
Keep the drill steady, don’t waggle it around like it’s your dick and you‘re trying to piss your name in the snow. A bit of lubrication can help.
I hope that helps. Regards Tyrone.