Well it is using a 4mm nozzle, not .4, but 4mm! That’s quite a bit bigger than the filament we use on our printers. It can also print 4 foot diameter objects. Let’s see your taz do that! My Max v2 prints awesome, and yes, it’s a pain in the ass to get dialed in, but they’re fun to watch print.
Also, if you’re going to use the mpcnc as a printer, then you can make the z as long as you want. You don’t have to worry that much about side forces for printing, unless you get some print curl, then things will get ugly.