I designed this bracket to fit on the X or Z gantry plate in such a way to make it easier to contact the X or Z end stop with or without a fine tuner. The fine tuner can be an M3 screw that goes into the small hole. It would need to be lined up with the X & Z end stops of course. The larger holes are for the regular spacer and eccentric spacer to fit into. The spacers will only go on one way so you may need to turn your gantry plate around if they are reversed. Otherwise, the holes may be tight but should work.
This thing may work on other gantry plates with the solid V wheels on 2020 rails. The thickness of the gantry plate in this thing is assumed to be 3,2mm.
Designed to work with http://www.thingiverse.com/thing:945800 or something similar.
I used the Meshmixer to create supports. I printed it with 0.1mm layers at a slow print speed (about an hour to print). The file with the supports have the supports with very narrow points and poles. I printed in PLA.