Kyle, very cool! If we could use auto path generation/regeneration to solve skew (pitch and yaw) as well as slight positioning errors my CNC world would be much happier.
Brian: Are the rollers (wheels?) meant for both standard bases and LST? Do they swivel to allow movement in all directions?
As an aside...
I like Kyle have a manual positioning jig but have often thought of building a sliding tray assembly. I do a lot of 3D carving, and while I try to stay within the 6x8 zone, it can be very limiting. Many will suggest I should have something like a Shopbot Desktop machine but since I do this as a hobby and my workspace is limited, a tool with a more extensive work area is currently not viable, besides carving is not the only thing I do with the Handibot.
The idea I kicked around for a while was to build a gantry system (I am not an engineer!). 1-1/2" t-slotted rails mounted along the edge of my cutting table with 1-1/2" t-slotted cross-members. The cross-members would ride along the edge rails using sleeve-bearing carriages, and then the Handibot would be mounted on a tray that moved along the cross-members again utilizing sleeve-bearing carriages. Positioning could be done using drop pins every 6 and 8 inches (X and Y) minus any overlap desired. You would need brakes on the carriages as well to stop vibration issues. I would need to be able to accurately drill the drop pin holes in the rails and then align with the opposite side. That is kind of where the whole thing falls apart.
So my manual placement system remains in use, and I tend to use a 1/4" overlap to try to lessen tiling artifacts. The 6x8 work area limitation is what drives my interest in the LST; it at least resolves the issue in one direction.