Just to disspell any myths of losing 360 rotation with a Wise Tension Head. This is a Gamma 6004. The tensioning track is extra long, so I placed it as far possible so the racquet handle just clears the handle. Is this wrong? I don't know, but according to my calibrators, it is still spot on. Also notable on the pics is the adaptor (about $45) for the Gamma machines. It is necessary, otherwise there would be too much of a downward pull. I added a hardware "C" clamp on the track for more support. The Wise Tension Head is only supported by a single screw.