Slowly, but surely, I'm assembling my printer. I'm at the step of installing the octoprint upgrade and I can't find it. Sure enough went back to the paperwork in the box and the paperwork in my mailbox and it seems that I didn't order it. Don't know what I was thinking. What parts should I assemble to Do It Myself Raspbery Pi. Is a 3 useful? I have several 2's kicking around, would they work? Is there anything magical about the DC-DC converter? This seems to be the one: https://www.amazon.com/SMAKN®-7V-24V-Output-Converter-KIS-3R33S/dp/B00N2G5HKC 1 x USB A To Micro B. How long should this be? 1 x USB A To Mini B. How long should this be? 1 x Red|Black Wire. What is the name of the connector? What gauge is the wire? THANKS!