But wait, If you find yourself changing a non wearable part like a thermistor cable doesn't that imply a poor design at play? Or poor assembly of the wires within the cable chain or w/e caused the chaffing that would lead you to change such a component? Your point is solid I am just saying a well built machine shouldn't need wires changed. Ever. Because it was well built. And even the cheap fans with the sleeve bearings have generally 20k-30k hr. life expectancy. If we go with ball bearing that number doubles. Wearable parts need to be easily accessible sure. But the parts you are listing should last the life of the printer. Or most of it at any rate.