additional bom

1x pei plate (150 or 165 will fit) 
1x magnetic sheet
1x temperature probe (cutout is sized for a 15x3mm 3950 thermistor)

the Production file can be used at your pcb provder of choice with 1oz copper weight.
this will result in about a 24V 60W-80W heater that takes about 5 minutes to heat the alu plate to 60 degrees(at 60W). orders vary in resistance in different batches. if you do order some please document your vendor and wattage for a larger sample size. jlcpcb varies from 56-72W

the temperature probe can be siliconed directly to the alu plate through the cutout (hot-glue should also be ok) 

make sure the wires have enough strain relief and enough space to move around