The ceramic ring is the heater, so i guess the time to reach the temp is at least the same or maybe even shorter.
Way less mass to heat.

@dc42
After a lot of trying i finally had the idea to flash it with my tablet and its working again.
I dont know whats the problem with my pc.
Tested different cables, usb-ports and versions of bossa.

Hi.
My Panel Due stopped working after an update.

Updated using bossa (writing and verifying were successful) and now the screen is black.
I have to connect it multiple times to get it recognised, and i still can write and verify, but no matter which firmware i try, it doesnt work.

@wilriker
Why using a plate between heatbed and print surface at all?

Im using 5mm plywood with a pcb heatbed on top and either 3mm pei-coated aluminium or 4mm glass. Takes around 12 minutes to heat up (110°C). Difference between the thermistor and the surface is 5-10°C.

10-15 minutes is pretty long.

G4 S600 after heating should work.

Hi.
Do you heat the bed and the hotend at the same time?

Im heating the bed first (with M109, although its deprecated), then the hotend.
That gives the heatbed surface enough time to heat up properly.

Hi.
Is it save to use one of the always on fan connectors as power source for a capacitive probe (lj12a3-4-z/by)?