Yeah, if you read thru those threads you'll see it was discussed. I gave links to some folks that did that to a Tormach and we talked about adding the same to a number of mills and routers.
Thing is it can take hours to print parts and you'd be tying up your milling machine all that while.
Seems better to have a standalone printer that can be printing in the background while
you use your mill for more important stuff.