Valid printing time problems. Mine is slow too, but unattended time is free, and is there a practical problem with ten, or a hundred units running in parallel?

There are beginning to call this additive manufacturing and there is no reason this need be done with plastic. I troubleshoot flame spray equipment in use now, that deposits metal powder, through a hydrogen flame, onto aircrraft landing gear, to raise up the surface. This old gear, is then ground back to original specifications and returned to service!

The technology is in use now.... :)