If building a y-axis with a piece of 20x60 vslot as the base, is it ok to have the carriage mounted so that the mini vwheels are on the outside of the base extrusion parallel to the ground (grabbing the outside of the base rail)? I'm wondering if this would put undue stress on the wheels/bearings with the weight of the build plate, glass, etc. Or should the wheels be mounted perpendicular to the ground grabbing the top and bottom of the extrusion? Based on all the pictures in the parts store, it seems like it doesn't really matter, but what about any real life experiences?