Which mate i must use for v-slot profile and wheel

Which mate i must use for v-slot profile and wheel v slot gantry Range of motion of ~80cm I'm picturing two sections of V-slot One mounted vertically The other section parallel and able to slide up and down viral 77 slot V-Slot Gantry Plate 204060: It has been designed specifically to simplify construction

viral 77 slot The V-slot gantry plate is designed to run on all 20mm sides of V-Slot linear rail This gantry plate is made from 6061-

vikingos gold slot These plates can be used to build a compact gantry that will travel along the 20mm edge of our V-Slot extrusion They can be used on any side of 20x20mm V-Slot Gantry Plate 65x65mm