I have a v1 that I just bought second hand. the SD card reader didn't work so I re-flowed the solder on the card and got that working again. It had the old hotbed and I am having issues printing ABS over 100 on the bed. the jobs kept failing at 105 (and lifting at 100). The printer would just stop half way through the job. The last time I noticed on Octopi that it was a bed thermal condition.
I swapped out the old hotbed with my other I3 (v3) and tried again with no such luck. Then i read about PID tuning. I wanted to PID tune the bed to see if that would help out but it seems disabled as default in the firmware. Anyone know if its ok to re-enable it? Is what I'm trying to do a no-no or something?