An external fixation frame system, comprising: a first support ring having a plurality of first apertures (60, 70) extending therethrough; a second support ring having a plurality of second apertures (60, 70) extending therethrough; and an adjustable length strut including a first joint member proximate a first end of the strut; a second joint member proximate a second end of the strut opposite the first end; a rod member extending between the first joint member and the second joint member, the rod member including external threads; and a tube member extending between the first joint member and the second joint member, the tube member including a hollow portion adapted to receive the rod member and an engagement feature adapted to engage the external threads of the rod member; and an actuation mechanism rotatably fixed to the rod member, the actuation mechanism including a plurality of gear teeth extending radially outward of a longitudinal axis of the rod member, wherein the first joint member of the adjustable length strut is adapted to be coupled to the first support ring, and the second joint member of the adjustable length strut is adapted to be coupled to the second support ring, the system characterized by a modular attachment member adapted to be coupled to the first joint, the modular attachment member including a worm gear adapted to engage the gear teeth of the actuation mechanism. a first support ring having a plurality of first apertures (60, 70) extending therethrough; a second support ring having a plurality of second apertures (60, 70) extending therethrough; and an adjustable length strut including a first joint member proximate a first end of the strut; a second joint member proximate a second end of the strut opposite the first end; a rod member extending between the first joint member and the second joint member, the rod member including external threads; and a tube member extending between the first joint member and the second joint member, the tube member including a hollow portion adapted to receive the rod member and an engagement feature adapted to engage the external threads of the rod member; and an actuation mechanism rotatably fixed to the rod member, the actuation mechanism including a plurality of gear teeth extending radially outward of a longitudinal axis of the rod member, a first joint member proximate a first end of the strut; a second joint member proximate a second end of the strut opposite the first end; a rod member extending between the first joint member and the second joint member, the rod member including external threads; and a tube member extending between the first joint member and the second joint member, the tube member including a hollow portion adapted to receive the rod member and an engagement feature adapted to engage the external threads of the rod member; and an actuation mechanism rotatably fixed to the rod member, the actuation mechanism including a plurality of gear teeth extending radially outward of a longitudinal axis of the rod member, wherein the first joint member of the adjustable length strut is adapted to be coupled to the first support ring, and the second joint member of the adjustable length strut is adapted to be coupled to the second support ring, the system characterized by a modular attachment member adapted to be coupled to the first joint, the modular attachment member including a worm gear adapted to engage the gear teeth of the actuation mechanism.