I'm sure others have done this, but I thought I'd share our video of our group 3-manning KP HM Fabricator.

The group was a guardian tank, a combat sentinel and a sawbones healer. We were all in mostly 72 gear so obviously out-leveled/out-geared it, but had a really good time trying to figure out how to balance doing the puzzle, sustaining the healing and hitting him enough to not hit enrage. The video is from the tank's POV