I think my drill and bits are good, I just slipped with my hand and lost control of the drill for a fraction of a second. I guess I did not adhere to the "careful" part enough. I should have drilled it before putting it in the car, so I could have had a perfect angle and better control. Or at least put the car on ramps rather than try to do something precise in a tight area. I took a pic of the hole. It wasn't straight in but the edge of the bit end. It didn't appear to hit anything other than graze the bottom, there are fins on the other side and it didn't seem to hit them.

Really not feeling very happy with myself now obviously ... think I'm going to not touch anything for a little while. I even burned my dinner tonight ... you know you're off your game when you can't even cook hot dogs right.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)