Warren63 wroteWhat size are the domes Simon and are they glass or Perspex? Do they come in other sizes too? They’re a great idea and I have a few other projects I could possibly use them on ! Great idea with the magnets too, I assume they’re the super strong earth magnets? Another suggestion could be using the flexible magnetic sheets available on top of the wood and then covering with green, red or whatever colour felt/baize you choose to use. That would give you a better magnetic contact and save you from drilling the underside of the wood (if that’s how you do it).
Glass, I’m not a fan of Perpex
One dome I got from Ikea which is about 25cm (£15) and the other from Amazon which is 36cm (£30).
The rotating base I also got from Amazon (£9) and is 10cm clear plastic smooth ball bearing rotating base (bases range from 15cm to 21cm so works well). I put some clear rubber feet (£4) on the bottom of this and the weight of the dome and keys holds it nice on the rotating bases.
Issue with a magnetic base is that if you aren’t careful all the keys stick to each other as they are all magnetic effectively. I think having a combination of rods and magnets at certain places works best. The magnets are very strong but just right that they don’t magnetise the key too much that they pull on others - I’ve currently just used blutak but I’m going to glue them or make a hole in the base to hold the magnet flush as I think that will work best. I’m also as I said thinking about making shepherd hooks to hang just haven’t worked out the logistics of how to get them to be consistent.
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