Linear Actuator CNC Rail + Stepper Motor Home build Solar Tracker V Slot

Hi, This is / will be a solar tracker for a 100 watt solar panel. It was a folding panel made rigid. I may change it for a 120 watt. This fence is south facing but, the sun hits the fence at 10:30 in the morning and moves down the fence over a few hours leaving the left section in the shade by 2pm, hence the linear rail. By 2pm the sun hits the west facing wall where there is a 120 watt panel. I'm going to add another gantry plate with 4 more wheels. Could also be used as a camera slider Parts here http:/