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Have him get a cheap dining room or circular kitchen table table off of Facebook marketplace. Id recommend making it a permanent fixture in your garage using 4x4 concrete posts plates and then using some aluminum sheet metal wrapped around the post hole to make a column. Sit the legs in the middle of the columns, attach the plates to the concrete using drill and concrete anchors, and fill columns with concrete. Then have him get build a rectangular wooden frame on top of the table. Make it taller than wider. Use 2x4’s for it and use extra 2x4s to reinforce the side opposite from the closest edge of the table. So basically the side farthest from where he’d be standing. Put a slab of particle board on the INSIDE of the frame. Buy you this mf right HERE and attach it to the inside of the frame, with the top of the threaded part sticking up out the top of the frame. Then getchu a harbor freight arbor transfer thingy to get it to the size of the threaded holes on those polishing pads. Cut up a 5 gallon Home Depot or Lowe’s bucket and drill a hole in it that’s barely bigger than the thread (preferably in the center of it) for the thread to go through. Use a plastic/rubber washer around the bolt, preferably there will be a non threaded part of the bolt closer to the top of the motor or at the base of the transfer thingy that will sit somewhat flush with the bottom of the bucket. If you need to adjust the machine to get it flush like that do so now, there’s channels in the base of the motor to help you adjust it easier. You gonna wanna run some boat epoxy around the outside of the ring to create a water proof seal, and drill a hole to sit a drain in, at the edge of the bucket. Attach the bucket to the frame with screws and cover the heads and holes with the epoxy as well. Use a hose to drain the bucket from the drain hole in a milk jug. Use a five gallon bucket that’s raised up higher than the frame with a small drain hose pointing over the grinding wheel/bucket and a ball valve somewhere in the hose for drip control to wet the machine. Run the sewing motor off a GFCI so that if it shorts yall are safe and so is the power. Use a old Tupperware container around the sewing motor with air holes drilled on the bottom (side closest to the table) to minimize water mist getting sucked into the motor, and also so that drip doesn’t get down into it from the thread/arbor. Use another plastic/rubber washer here with more boat epoxy (just make sure you don’t get epoxy onto the thread). This whole setup should cost less than $200, around $100-150. It’ll stabilize his workspace, it gives him more control over variables like RPM, water flow, and it eliminates the splash factor. And it will allow him to be able to eventually get a faceting stand to apply more uniform angles to his creations. This kind of setup is not ideal for faceting into unique and complex cuts; but it is good for rough shaping and for making basic angles.