In my car MOC, I braced both sides of most of the driven axles so when moving the axles won't wiggle out of the beams from the torque. In the example pictures below, I was wondering if the first picture, with the brown 3L with stop is good enough for use, or if I should always place a beam in front of it to prevent the 3L from pulling itself out (as shown in the second picture). Do I need to always prevent axles from pulling themselves out or is it fine without doing so? Any thoughts would be appreciated.