
Long version:
I have a Series 3 Dock (4337) and wanted to remove the alignment guide as it blocks the X220's side exhaust vent. Whoever thought it was a good idea needs to be hit with a Selectadock III.

Found a very good guide here: https://joes-tech-blog.blogspot.com/201 ... n-for.html
Though it's for the Mini Dock Plus (4338), the instructions were applicable to the 4337 as well.
I successfully disassembled the dock and removed the alignment guide, but encountered problems putting it back together.
First, the four screws in this picture cannot be screwed back anymore:

Larger version
It turns out that the screw posts had broken off (perhaps the plastic got brittle with age?)
I continued reassembly despite that, and discovered that the eject mechanism doesn't work anymore.
It seems that those 4 screws hold the two halves of the docking/eject mechanism.

I'm in the process of figuring out how to replace the screw posts, but with the parts I have, I'll probably use standoffs like these:

Wish me luck.