Quick update: The manual stalled out due to work on REV B of the X Carriage. At I started writing down the process, I became convinced belt tensioning is a thing that needs to happen. So I'm bringing back a version of what I had on the prototype printer. New carriage will also have a better way to mount a single E3D hot end, so you don't have to take apart X Carriage to remove it.
There are a few other special projects in the works, one of them involving E3D Titan ;)
REV B will be going up tomorrow after I have a chance to put some more QA time on it.
Updated BOM to reflect some changes discussed on GitHub. Big thanks to codexmas for QA work. Checked in a PDF version of the BOM. Manual is getting closer to being finished.