Linear Rail Gantry system

This is my WIP of a linear rail system. It consists of 2 main parts, the shuttle and the rail. The rail has 2 v-grooves that the v-groove bearing of the shuttle fit into. The rail also has a linear rack that will mesh with the gear drive system contained in the shuttle.

The rails are designed to be connected together end-to-end so any length can be accommodated.

The shuttle will also contain a stepper motor propelling itself along the track via a gear.

I believe that with a little more