The other issue is the heating element. As the nozzle size gets larger, the rate limiting factor is no longer the motion system and whatever adaptive control, b

The other issue is the heating element. As the nozzle size gets larger, the rate limiting factor is no longer the motion system and whatever adaptive control, but how fast you can melt the plastic. Most consumer 3d printers can't really take advantage of these large size nozzles, although you could print slowly and it'd still be cool!