alternatively needle 5 may be affixed with a threaded portion or permanently attached by welding or other means needle holder 4 is retained by a screw not shown that passes through hole 3 d in top door 3 needle holder 4 and into needle mount 4 c needle holder 4 is attached to top door 3 by an additional screw not shown that passes through holes 4 a needle 5 passes through needle slot 6 b of foot 6 foot 6 is pivotally attached to needle holder 4 by foot mount pin 7 spring 8 not shown resides between foot 6 and needle holder 4 in spring mount 6 c the lower door assembly will be described with reference to fig1 3 and 4 mandrel cover 26 is secured to lower door 14 by screws not shown that pass through mandrel cover 26 and lower door 14 mandrel cover 26 includes needle slot 26 a that allows needle 5 to pass through mandrel cover 26 and interface with rotary stitch mandrel 15 mandrel tensioner 20 is secured between a pin attached to rotary stitch mandrel 15 and pin 14 f that is secured to lower door 14 mandrel tensioner 20 may be a spring rubber band.