[Keith] wished to utilize his makerbot for some PCB milling, however he ran into a quite huge problem. The platform that his PCB would sit on was mounted with a layer of double sided foam tape as well as was not perfectly aligned to the head. Not only that, however it would tilt when pressure was applied. This made the result of the milling totally unacceptable. To treatment this, he made a new platform that is not only rigid, however he has made it to ensure that there is the capability to change it for perfect alignment via modification screws in the 4 corners. At the beginning of each session, he can be absolutely sure that whatever is aligned completely as well as his PCBs show a significant improvement. You can see a comparison of the two in the complying with picture.
[via HackedGadgets]