I am sorry for all the people having problems, but my Prusa mjni is finally just workjng and happily printing all the stuff I throw at it. Its been having issues here and there forever. I just figured out that the hotend has not been assembled correctly (heatbreaker to nozzle seal was weak) which became a greater issue when switching to a 0.25mm nozzle. Now after I fixed it, it is just awesome :)
Just as satisfying when you print something with several parts and the tolerance is right first time. You hear all about people printing several prototype parts to dial in the design. Nothing to make you feel like a design king by first print mic drop.
I printed a large complex part once, only to see I overlooked another thing that got in the way of my part. Instead of changing my design and re-printing it (which would take hours), I walked over to the mill and milled off a section of my print so it would fit properly. Plopped it on, fits like a glove, design king status achieved!
I once designed a first prototype, and it worked so well I didn’t need the other 3 iterations I was planning.
It was a few years ago, but I’ll never forget (and probably never manage that again).