Prusa3D Core One assembled from kit ( https://www.prusa3d.com/product/prusa-core-one-kit/ ) in roughly 36 hours, including 5 hours of sleep and frequent toddler-herding
Quite fun and satisfying
I did make a few mistakes, but wholly my own, and avoidable by reading the actual instructions
Benchy test print (15 minutes) is complete, so I guess I can start planning holiday show-bag gifts for nieces and nephews
My MK3S+ took me a solid 10 hours of working on it straight, basically spent an entire Saturday on it. It was one of the more difficult things I’ve done, probably would’ve been easier in two sittings, but I was too excited haha. I think my main issue was that I ate the gummy bears before opening the manual and learning that they were needed for construction.