Sounds like a great reason to upgrade to the BondTech BMG-M with Mosquito hotend. This hotend is made to print at 450c+ and the metal the hotend is made of doesn't soften even when it gets up and over 550c. This extruder assembly should have no problems with heat even over time and nozzle changes can happen with just one hand. I mean I have a Titan Aero with an E3D v6 block & sock & 0.4mm nozzle and I had it printing for 5 days non stop without issue for a stress test after final assembly. I would simply NOT tolerate having no answer for my electronics burning down. I mean unknowns like that are what start fires at random times and resetting the hazard with a camera is a great way to watch a fire burn but if you could do something to prevent it from happening again, wouldn't that be sweet? But how do you do that if you don't even know why it burned, right?