Nice video. I've been zapped a couple times when I thought the charger was unplugged.It was only a small tingle. It hasn't killed me...yet. I would not drill a hole and put a screw in. I've seen other people suggest this. If a relic has a little rust on it, all I do is wiggle the battery clip to it. This makes a good contact. If there is a lot of rust, I will knock it off with a small hammer and scrape it with the end of a file to get a clean contact. Electrolysis is fun.