I finally got the rail and went to fit the gantry plate only to find that there was not enough clearance between the rail and the bottom of the gantry plate, the screws and Tee nuts were hitting the rail. I purchased some 30mm M5 screws and some 3mm spacers and replaced the standard 25mm screws that came with the wheels. Now the gantry fits the rail with a couple of mm clearance . I have now updated the rest of the rail component and will be adding the controller box build in the next couple of days.