[morzh]

Trying to drill the holes in the rivets. I knew it was going to be difficult. Have experience.
The first drill made one hole, then refused to finish the other one. I looked at it - it was literally worn out. CCC. Thought it would at least work on aluminum. I have 10 of them, so I put another one in; it almost finished the hole but broke.
Well, let's just say getting it out was...onerous. I had to start grinding down the back side and then trying to guess where the drill was trying to come out. I thought I'd hit the drill but obviously the grinding stone bit was grinding the drill bit as easily as the aluminum, so I kept ending up with a flat grind with no indication of the drill tip. So I switched to the ball grinder and it eventually bounced off of something. I used a puncher on a hunch and, luckily, from the 1st try I was onto the bit. The rest was knocking it out. In the process of which my box of assorted capacitors fell off my bench.....so I also spent some time doing nice bend over-straighten up exercise. Probably did me good.
Two more holes to go, hopefully only 2 more drill bit with no breaking.