Prusa3D Core One assembled from kit ( 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