In certain embodiments, {HEAD ~ the upper housing member} has {TAIL ~ an outer diameter} which is generally equal to or slightly larger than the second diameter of the second recess so as to create a frictional fit between the intermediate housing member and the upper housing member 
In certain embodiments , { HEAD ~ the upper housing member } has { TAIL ~ an outer diameter } which is generally equal to or slightly larger than the second diameter of the second recess so as to create a frictional fit between the intermediate housing member and the upper housing member
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH