looking for a good 3d printer

[magicniner]

I've just upgraded to a Mk3 bed on a 12v printer and although it's not quick it's not as slow as some have experienced.
The Mk3 bed has two 12v heater circuits, connect them in parallel and it runs on 12v, connect them in series and it runs on 24v but in either case each circuit only gets 12v, for heating the problem is not the voltage it's the voltage drop experienced with inadequate power supplies often shipped with basic 12v machines.
I am planning to upgrade a separate bed heater PSU with a torroidal transformer, a rectifier, a bit of smoothing and a DC-DC solid state relay.
I have a larger format 3D printer build in the pipeline for which I've decided to use 240v Silicone heater pads using a solid state relay to interface with the control board's standard heater output.