Hello, I like your video very much. I have a little suggestion. You can try a magnet on one side and a metal that can be attracted by the magnet on the other side, so you don't need to think about the magnetic pole every time. Moreover, the metal on one side can be processed and can be processed into any shape we want.
You're right, that works great too. The only thing to be careful of is if you bond both sides at the same time, you can accidentally glue the upper and lower together. This is easily avoided by sticking a piece of teflon tape between the magnets so excess cement from one side can't touch the other
