I recently completed several mods to my MPSM. Before that process though, my bed started to have the standard issues and I found the broken wire and fixed it. Sometime after that, I noticed that the bed was having troubles getting up to 60C. It got to 50 and 55C easily and then stalled out. After testing it, I see that the resistance across my bed is 3.4-3.5 ohms. Google hasn't really returned much info on this but it appears that other, larger beds tend to have a resistance in the 1-1.2 ohm area and I'm wondering if perhaps something else is going funky with my bed.

List of Mods

E3D V6 Hotend

Upgrade for 40mm Heatsink fan and radial blower part cooling fan

Nema17 Z-axis swap

Nema17 Extruder motor swap (original kept missing steps)

Filament guide upgrade

X-axis Gantry support

X and Y-axis all metal gears

Ramps 1.4 upgrade

35mm Z-axis extension

35mm skirt(modified the 25mm skirt for a little more room)

12V 20A PSU

PrintInZ Flexible Bed.