Hey! No, they have their own 20" bikes now. The only thing I use the trailer for anymore is hauling their bikes home after we all ride to school.
I tried flipping the trailer mount up, and it did level the arm, but I didn't feel secure with a hundred-whatever-pound trailer hooked to it that way. (Don't remember why, exactly.) I wasn't having any problems with it down, so I just put it back. No issues...