Saturnine in my mind
I am pretty sure you are all good ,mate. I've done this a few times,there is nothing irreversable,if you dont like the results ,you can always dial back to the original setting.I hope I haven’t broken my p80? This thing is amazing, well done sir!!!
The P80s have the heater hard wired to the mod,which should give very stable resistance readings ,unlike 510 connection,where there is variation from mod to mod,which. also happens with oxidizing of the connections . So i would rather try to max the temp scale and be in peace with the number displayed ,before trying to make lower temp settings hotter. (hope that is making sense)
I hope you mean 0.003 .Just keep the steps small 0.001 and you will be all good .