The method includes the steps of attaching {TAIL ~ a guide mounting plate} to one of the grid mounting plate and the first support bar, and thereafter mounting a magnetic guide member to the guide mounting plate for vertical movement relative to {HEAD ~ the support surface} 
The method includes the steps of attaching { TAIL ~ a guide mounting plate } to one of the grid mounting plate and the first support bar , and thereafter mounting a magnetic guide member to the guide mounting plate for vertical movement relative to { HEAD ~ the support surface }
OTH OTH OTH OTH OTH OTH OTH TAIL 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD