I think this is an awesome idea!
and I would be very willing to help out if I can - I have done the Lawsy carriages and also upgraded to a Rumba board & new PSU at the same time (with a LOT of help from wardjr.
thanks ward!) due to the stock board failing.
I spent many, many hours searching & reading before doing either upgrade, and you are right - it would be nice to have some nice, clear documentation in one easy to find location for these things.
The thread on the Lawsy carriages is a great resource, but there are so many pages to read thru and the machines have gone thru physical changes since that was started, making some of the information a bit confusing and/or outdated. Things like the Y rod clamps vs collars... and the front pulley blocks - adjustable vs non-adjustable, and where/how the carriage stop switches are located, too...
There are other little things I have done as well, like a bed stabilizer on the front, a fan on the X motor (repurposed one of the SD4's stock fans), and just yesterday I flipped the door on the front to make access easier for me. the stock right hand opening door didnt work very well where/how my printer is located...
SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1