I did the upgrade kit to take my UM2 to UM2+.
At the point where you install the new the geared feeder, I couldn't immediately get the metal mounting bracket off, so I thought I should try unscrewing the 4 screws on the face of the gear box. I heard and felt what seemed like parts under tension shifting around when the screws came out. I'm guessing I broke that piece?
youtube vid at 1:51
The piece I'm talking about is at: https://ultimaker.com/en/products/extrusion-upgrade-kit
If you scroll down to "What's the in Kit" - it's #4
On a different note, the black braided bundle of hotend wires comes out right where the PLA goes in from the spool. Seems they will rub on each other, which seems like a bad thing.
youtube vid at 2:06
Is this a known thing? I was going to do something janky to force the black bundle out of the way to the side.