1. Heatbed cable assembly (part 1)

I want to encourage everyone to follow FEW's advice.  I am refurbishing a 2017 MK3 and several magnets have fallen off the back of the heatbed. If you see magnets attached to the Y rails or the frame, collect them to reattach later!One long strip of high-temperature Kapton tape will hold down several magnets at once. Just trim it close to the edge so it doesn't stick out the sides. I used a stainless steel alloy razor blade (only weakly attracted to magnets).One WARNING, though: Do NOT scratch the underside of the heatbed - that is the actual heater! Also do not use any kind of metallic tape due to the risk of shorting out the heater. And as FEW said, avoid taping near the 9 mounting holes, so that you don't raise the height of the bed anywhere. If needed, use a fingernail to push the tape away from the holes, or remove and apply a new piece.