In {TAIL ~ selected embodiments}, {HEAD ~ an extension link} may be constructed so that the length between the stud and aperture is adjustable 
In { TAIL ~ selected embodiments } , { HEAD ~ an extension link } may be constructed so that the length between the stud and aperture is adjustable
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH