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Hello. I've found some nice heated beds on aluminium base - like that one http://ru.aliexpress.com/item/NEW-3D-pr ... 69061.html

And I have ordered and received one of similar ones (not hexagonal, round one), it's very nice.

But these are 265 mm diameter, while I want ~320 mm for my Max Metal, like ONYX. They say (check link) that they could make custom size if customer will order 20 "tablets" (i guess it's 20 pieces?), but I need only one or two. Maybe someone want to make order together?

I made my own heated bed from a 6# slab of aluminum from http://www.sandsmachine.com/alumweb.htm and slapped some 110VAC silicone heaters on it for my last build. I also integrated my own FSR mounts and glass clamps to hit the holes that were already in the aluminum...

[img]http://i.imgur.com/o44aqan.jpg[/img]
[img]http://i.imgur.com/MZKMlS2.jpg[/img]
[img]http://i.imgur.com/OjVTTYe.jpg?1[/img]


It wasn't stupid expensive to do, but it doesn't work as well as I'd hoped. The main issue is that the heaters have a 120C thermostat in them. The pads heat up so quickly that they reach 120 and turn off before they've had a chance to transfer very much heat into the bed...

Working on the next design revision now.

Shenzen Ali Brother Technology will make a silicone heating pad to your size, voltage and power specifications, with or without thermistor. I suggest you get one a little smaller than the bed plate to leave room for fixings near the edge. They sell through aliexpress.