Nice job on the nozzle holder btw, I wish I had that many in 54mm I needed to keep track of but you've given me an idea for my larger nozzles.I really want to get the MMU 2.0 but I am hesitant to pull the trigger until I feel it is mature enough. Is anyone using the MMU 2.0, if so what is your opinion, ready for prime-time, pros, cons, etc. Also Prusa hinted about a completely new printing technology that they are working on and will be announcing in 2019, something that hinted as being a game changer, paraphrasing that last part.
I've also looked at the MMU but I figured I'd wait until I get more experience. It would be really useful to hear from someone who already has one.
I got OctoPrint up and running. I went with a Raspberry B+ rather than the Zero that mounts right on the unit. I printed a case that mounts to the frame just about the controller's case. I added a $10 webcam and I've been very happy with it. I really like that I can send files to the printer right from within Slic3r. I can't believe how much better it makes the entire process.
The short shaft on the extruder gear is really a terrible oversight on Prusa's part. I noticed that when I was building mine and I was really surprised there was not more in the manual about setting tension and alignment. I know some of that comes later but it would be a lot better if they beefed up that section of the manual. I've seen others complain about their MK3's and I bet that shaft is the source of a lot of issues.
Again, thanks all for sharing your knowledge. It has been super helpful to me and I'm sure many others.
Tony