A write up on my install:
car: 2018 GTI SE with mib 2 in glovebox
parts:
helix $350 from fb mk7 group
long bolt for spare tire + nut from regular bolt $20 from dealer
radio removal tool $7
https://www.amazon.com/dp/B018GKO6OQ
terminal pin removal tool $7
https://www.amazon.com/dp/B07K3TQS26
I ended up not using any trim tools for the door sill, only the side panel of the glovebox area.
I also did not fully remove the rear seat, it's enough to just pop it off the retaining clips and lift it up to get to the trim of the door sill.
None of the trim was fully removed except the kick plate below the glove box leading to the door sill. it was enough to pop it open and run the cable.
When wiring the back of mib unit, make sure to do it so it doesn't cross the existing cables so you can actually push everything back with enough room to seat the unit all the way back in. Also don't have the cables come straight across to the glove box side panel. It will get pinched between the plastic and the mib unit and it won't go all the way in. It helps when running the sub end connector through to tape it with electrical tape to some pull string or small tube as a pull cable. I did this for the glove box and also running it under the seat to the trunk (in that case, it may help to have someone in the back to grab it and pull through the slack as you lift the seat and feed it from the back seat).
Trim removal took about 5-10 min, wiring took about 20 min, running the cables and managing them neatly took another 30 min. It took a bit longer since I was stopping to go step by step with the youtube video and also taking pictures. If you have the steps down pat this could be a 30 min job. Currently still waiting for the dongle to program it.