Just upgraded my home machine with a custom heatless-bed-upgrade. Pretty much the same as the official heated bed upgrade, but then without the heated bed. (All build from parts that did not pass QA at Ultimaker)
The old bed was really starting to come lose after 3 years as the other foto shows. So it needed constant adjustments.
So, this is an old Rev3 UMO, with UM2 electronics, dual fans, custom bed, homing to the bottom (as in the UM2). You’ll also be surprised about the amount of holes, as this thing has had dual-extrusion fitted on it, UM2 feeders, side windows, and a few other random attachments that where removed again.
