Inexpensive fixes for z-axis slack imprecision on Maslow CNC

Issues addressed:

Eliminate play in z-axis worm
Reduce imprecision due to tilt in the connection clip between worm and router body

Issues in research:

Multiple drag points in z-axis and router assembly
Modified z-axis clip can cause enough drag to rotate z-axis clip, disengaging it

Routers these fixes can be applied to:

Router Model	Ridgid R22002
Loose Worm	Y
Angled Mech. Fuse	Y
Weak Fuse Spring	tbd
Friction Points	tbd