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
It took me a week to assemble my mk4 last year, between work, cores and kids but I loved the process.
I loved the process as well. The instruction is very well made and it’s an extremely satisfying process.
The printer is now getting close to 2500 hours of printing and still printing well.