The vertical support means includes {HEAD ~ a plurality} of {TAIL ~ support columns} positioned between the top side of the guide member and a fixed plate secured to the housing 
The vertical support means includes { HEAD ~ a plurality } of { TAIL ~ support columns } positioned between the top side of the guide member and a fixed plate secured to the housing
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH