After taking the rubber covers to access the bulbs (I assume that is what you meant by caps) the lamp internals do not jiggle, but I can see that the gap between the pivoting part and the rest of the housing gets wider, and in the direction that would make the light aim off to the right like it does. (viewing from the front through the 'glass') I will see what I can do about getting the 'laughtermarket' headlamp warrantied, as the OEM light did clean up to an acceptable level, but against the new aftermarket light on the other side (which is fine) it's a noticeable difference in light output (even with new bulbs in both)
Thanks all