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If you're routing some magnets in to the desk why don't you use a steel layer underneath the worktop?
Sumo-
I guess I could recess a very thin something into the top, but not the entire thing - A because of the size and B because I'm routing in a Logitech PowerPlay (upside down) into the desk so it's perfectly flush with the desk with the aim of charging and receiving 2.4ghz signal through the valchromat.
I've just received a big pile of pieces (350x550mm) and actually even at 8mm it's rock solid so think I could def do a 2-4mm recess in it.
The surface is lovely fwiw - def nice for a mouse pad. Going to do a few tests of spilling/wiping stuff on it and then test a few other sheets with different finishes (matte varnish / hard wax etc)
CYOA
Magnets
I want to stick magnets to a sheet of 8mm thick material so I can have it as a permanent but removable desk surface. I don't want to screw the magnets into the surface because I imagine, being 8mm thick, it would rip or damage when I pulled them off. I don't want to see any screws on the clean side of the surface.
I could probably keep it simple and just use some self adhesive magnetic tape but I worry it'd fail over time and getting it back in the same spot would be a pain.
So am imagining some kind of enclosure (surface is valchromat so potentially an enclosure of the same - whatever will bond to it with no chance of it falling off ever with the right glue), then screwing the magnet into the enclosure.
So the magnet is screwed in and the enclosure is bonded to the main surface. Then the main desk has matching magnets routed into it so when the surface sits on the desk it's all flush and seamless.
Anyone got any thoughts on what material of magnet/brands/what amount of pull I'd want (I'd say I'd want at least 4 magnets, possibly 6 - one on each corner and one in the middle (surface is 1000m x 2000m x 8mm).
Given the 8mm thick material, I'm not expecting great big thumb size things sticking into equivalent holes in the desk so all got to be fairly tiny.