a plurality of movable bows connected to said cover, each movable bow having a guide at {TAIL ~ each} of {HEAD ~ its opposed ends}, 
a plurality of movable bows connected to said cover , each movable bow having a guide at { TAIL ~ each } of { HEAD ~ its opposed ends } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH