Billj, you are correct about the right side of my gantry it is very tight to the rails.
Quick update as not much has happened since last time. I have installed the PSU and G540 into the side bays.
Also put in a terminal bus as per Randy's design to make wiring a bit easier. Apologies for poor quality of photo
Tonight was spent looking and thinking about options for home and limit switches. I know what I want to do with the X and Y axis at this point but less sure on Z axis. I also decided before I get too far with that it is time to move the CNC dedicated computer into its new home (the garage) and hook it up and see if we can make motors spin and things move.
All for now, Dave