I build all my trucks so that no axle turns and agree that is just an accident waiting to happen especially when the grandkid’s are nearby. I do the same but use solid plastic axles and I use Moebius wheelset most of the time. Before glueing the tire/wheel combo on, I will take the time to rotate them, mark them so they all line up well and make contact to the flat surface. Takes time, but to see a finished rig with an inside dual hanging in the air just looks strange.