Dimension needed


I’m trying to finish off a Lowrider, but used 4080 extrusion for the side rails of my table. This means when the Z tubes are hard up against the rails the wheels are annoyingly hanging over the edge of the slot in the top of the rail. So I need to add around 4mm to the clearance to get the wheel riding in the slot.

I’ll reprint the cone bit and the other two bits holding the wheels. But so I can calculate correctly, can someone who has modelled the assembly tell me the Y (horizontal) distance between the Z tube and the centre of the skate wheel?