the platform 24 which is intended to rest upon the ground providing a broader base in order to stabilize the gsc 10 and to provide a place for the user to stand while swinging the mechanical linkage 25 the frame 20 is attached at one end of the platform 24 and extends up from the base platform 24 in this preferred embodiment the frame 20 is comprised of an angled pole or column 20 a braced by a crossbar 20 b which supports the pole 20 a as it leans over the platform 24 the pole 20 a of the frame 20 does not project straight up rather the pole 20 a angles towards the portion of the platform 24 upon which the user will stand as it rises vertically this configuration provides additional clearance between the frame 20 and the mechanical linkage 25 the height of the pole 20 a is not adjustable but is fixed typically the overall height of the frame is approximately 75 inches to 87 inches in the preferred embodiment the frame 20 is approximately 81 inches tall at or near the top of the pole 20 a of the frame 20 is a hole with pillow block bearings 31 passing all the way through the frame 20.