Roland MDX PCB adjustible cutting collar

When cutting PCBs or other sheet material with the Roland MDX-15 it is hard to keep the height fixed. The material can deflect or pucker.
This collar mounts on the Roland cutting block and has adjustable ball screws to set the height.
use Mcmaster 98625A650 precision adjustment set screw and 98625A960 Brass bushing. The bushing holes need to be drilled to 0.312"

When using:
1) insert the cutting tool zeroed at the surface.
2) adjust the set screws up so ~0.005" or about the thicknes