1. Begin assembly

"If you want to use PrusaLink with the full-sized RPi 3 / 4 over USB, use another printer type or just crave for more info, visit the Prusa Connect and PrusaLink explained article." I find this part very confusing. It sounds like I should use another printer type if I want to use PrusaLink with the full-sized RPi 3 / 4 over USB. I think that a comma here: "printer type, or just crave" would make it a bit clearer.

MMU2s works in version 7.0RC2, although cancelling print does some wacky stuff with the filaments, so your need abit of work post that (unloading the filment etc...)

Is there a timeline for MMU2S support?If not, is there a way to have it set to only print in 1 of the 5 materials via Prusa Link?

So, since there is zero availability for this card (other than the ones with 90% markups) can this be done with any other Pi model? 

Why does it say "Difficulty: Very Easy" if soldering is required?