Where did you get your magnets I think I like the idea of the round better than the bar Thank youI did the golf cart mirrors attached with magnets
Went to the hardware store and got #10 x 3/4" bolt and nut (no washer) used a little loctite.
The round magnets (I believe) give a wider surface area..... anyways these things are ON-THERE. I was going to drill another hole to add a 3rd magnet... but I don't think there is any need, you can adjust the mirrors all day long and they do not move.