The Folly, as I've probably noted, is an Anet A8 - which is a clone of the Prusa i3 model - and is pretty much the platonic ideal of a DIY kit, in my limited experience. I have more experiments I'd like to do one it, but I'd also like to keep the Folly operational so I can make parts for itself.
Obvious solution: wait for it to go on sale and get another one to rebuild as a three- head monster.
https://m.gearbest.com/3d-printers-3d-printer-kits/pp_337314.html?wid=21