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Very nice piece of work; only downside is that the crystal centre is going to collect dust and be very difficult to clean.By the way, did you know that those beautiful coloured geodes are almost all artificially coloured? Naturally occuring geodes are generally grey with only occasionally amethyst (lilac) and pink. They are coloured by soaking in coloured dye before being cut,which permeates the amorphous outer layers and colours them according to their density.
I agree with mje - better screw the side pieces sideways onto the base than the way you did it. That way you could use 1/4" coach screws and wouldn't need the angle brackets.Useful tool though; i made a similar with an old hydraulic jack years ago and used it to press out (and in) wheel bearings.
I do this and similar polishing jobs in the out-house sink with a fine trickle of cold water flowing onto the wet-and-dry paper; easy to clear up, no trays, no spills, just the granite tile I use as a flat base to rinse off and done.
5 minutes for each layer; 20 layers. 5x20=100 minutes, plus preparation, and not much time between layers to do anything else!Labour intensive sweet-cake.
Looks really good though; think I'll try it some wet afternoon.
Be careful with the big rare earth mags; bring them too close to each other without proper precautions and they can jump and cause painful flesh injuries! See https://www.kjmagnetics.com/safety.asp
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