I am working my way through what to buy for the Wilson ii (thinking of a 200300300mm build volume) and have read many reviews of pcb heated beds heating very slowly. I have also found that it would be cheaper to get a (https://www.aliexpress.com/item/silicone-heating-pad-heater-12V-200W-200mmx300mm-16-7A-for-3d-printer-heat-bed-12V-200W/32712689517.html?spm=2114.01010208.8.4.Jaq7aP) silicon heater and stick it to a sheet of 3mm aluminium (200*300mm) with the necessary holes drilled in it. However, the wires shown in the picture seem very thin for 16.7A (200W 12V heater). I assume this heater would require an additional mosfet/ relay so that the heater gets enough current (links please).
a) For this build volume will I need DRV8825 drivers (is it advisable to just start with these and never have problems) and high torque stepper motors.
b) How do you set up the DRV8825 drivers in Marlin?
c) What final height, width and length should I expect my setup to take up?
Many thanks in advance.