Config for BQ Prusa i3 (RAMPS)

Not sure if this should go here or on Developers, but I submitted a working config for a Prusa i3 clone a couple of weeks back:

This is my current working config (aside from very minor menu tweaks), and I also wrote a blog post about the Klipper experience:

I am looking for someone to review that config and merge the PR in, since it is sure to be useful for anyone with ancient RAMPS-era devices of the BQ family (the WitBox and the various Hephestos are all very similar).