A pair of tubular risers each having {HEAD ~ an upper roller} therein at {TAIL ~ the head end} of the frame direct arm cord ends to a cord retraction assembly mounted on the carriage 
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A pair of tubular risers each having { HEAD ~ an upper roller } therein at { TAIL ~ the head end } of the frame direct arm cord ends to a cord retraction assembly mounted on the carriage
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH