Y Gantry fo 20mm Extrusion (Core XY)

Designing and building my own CoreXY printer.
I'm only using 3 printed parts this is one of them its designed to fit 20x20mm extrusion and hold it as a y axis. you will want to m5 tap the 20x20mm extrusion

no adjustment, eccentric spacers or messing about is needed for use with the mini gantry wheels, just
4x m5 25mm bolts
4x m5 standard hex nuts
4x m5 washers
4x mini V wheels
8x m5 lock nuts

it is important to use lock nuts! as the inner diameter of the locking part of the nut is th