I did do some DIY ledges for my Japanese Ratsnake enclosure here if you're looking for something more unique, though it's very time consuming. Again attached with silicone. I followed this instructables guide for the process. I would strongly suggest avoiding the magnets and instead securing with silicone. Ball pythons are pure muscle, especially if they're given the chance to climb and use it.
Yeah so far the magnet experiment has been a bust anyways haha. I’ll check out those resources!