@peter247 said in Silicone Heated Bed:
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Now I've come to the opinion the best way is thin aluminium plate 3 or 4mm and flat glass / shims , what is the point of a heavy plate if it bowed ?

@peter247 sounds like a great idea. I didnt like the aluminum bed because of the weight and because 40% of it is outside the printable area. Not an efficient approach in my opinion on a machine that moves the bed in x or y. A lot of wasted energy. I here many claim the poor thermal conductivity of glass as being the reason for aluminum but the glass is thin (relative) and has a high rate of heat flow even though it is a poor conductor.
If you ended up with a flat piece of aluminum you may be able to plop it down on a layer of PVA glue and call it a day bypassing the shims