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