I started this pet project yesterday and have spent all yesterday and today looking for parts and building the versions and mocks. 1 changed direction twice and finally settled with this build.
The build consists of wood planks that i cut to measurement, aluminum rails x2, bearings, wheels, nuts and screws,
My next step is to build the motor system using 2 motors motors - toothed belt - toothed disks and to build a small remote allowing for speed adjustments and directions.
Follow my progress on the facebook page