I've started printing polycarbonate at 275C/120C extruder/bed, and it looks like its almost there in terms of part quality. I'm using the all metal hot end. I've tried to get it past 280, but that appears to be the software maximum (as anyone who's seen the preheating whilst copying a file has seen). Does anyone know if its possible to go above 280? Is there a way to trim the thermocouple down?

Also, for anyone who is trying to print higher than 250C, it looks like thats Flashprint's maximum and you need to alter the gcode file in a text editor (second line).