Summary

The original guides I made with PVC plumbing fittings an R/C aircraft wheel-hub and pieces of plexi.
Furthering my SolidWorks skills a bit, I submit the new printed guides I've installed on my RoBo 3D.
They comprise the Slot Guide and the Roller Guide.
Slot Guide for the Robo 3D Printer .....helps keep the filament centered in it's travel to the printhead.
Additional Items Required:
1x 3x12mm SHCS Bolt
1x 3mm Flatwasher
1x 3mm Nylock Nut
Roller Guide for the Robo 3D Printer .....helps keep the filament managed and tangle-free as it comes off the spool (let it swivel about the top bolt threads of the spacer). This item needs some clean-up as a supporting structure is built during the print (mine cleaned-up easily).
Additional Items Required:
1x 3x20mm SHCS Bolt
1x 3x30mm SHCS Bolt
3x 3mm Flatwashers
1x 3mm Nylock Nut
1x 30mm Metal Spacer with threaded 3mm holes both ends
Works great! ....Enjoy!