Hello Michael, I'm still trying to decide really as the extrusion from mcmastercarr in fusion360 is not the dimensions it says it is as its 0.200mm out and it's messing up my designs so I think I'll have to order the extrusion and then measure it to check then go off that figure in cad.

It's not too different from my current build what you built, just slightly different gantry design.

Rob