Printed in PLA. I cut .193 inshes off the knob end of the gantry to match the width of the z axis carriage of my A8. This means I wont lose print area because the print head won't hit the gantry. I uploaded the modified gantry to Thingverse with credit to the original creator and a link back here.
I melted a spare M3 nut into the knob and cut the head off one of the longer spare screws. I glued a nut into the gantry and glued the headless bolt into that.