I’ve not yet built a LowRider, but it’s definitely under consideration. But, there is something I don’t understand. What keeps the x-gantry from resisting side to side movement? I obviously see the roller wheels the assembly moves on, but are there other guide wheels that press against the side of the table that keeps the gantry running parallel to the table? I’ve looked at lots of pictures and I’m drawing a blank! Feel silly asking the question!