Pulled everything apart and one contributing factor was that the PFE tube had expanded from the heat and was causing far too much friction. Stretched that out a reasonable amount, and while I had it apart the m*f*ing power wire for the fan snapped off. Gonna have to buy a new one and splice it in, since the RigidBot has it hardwired there instead of using a connector....

After that I was attempting to troubleshoot in small bursts to avoid overheating anything, and the temperature kept fluctuating between 190 (where it was set) and (210), so maybe the thermistor is crapping out too. Regardless, the PFE tube hadn't been the only issue, was unable to get a single line to lay down properly after that.

Maybe it all just needs to be tossed in a pile and set ablaze... Or I need a nap.