Definition of a cutback tattoo machine?

the term cutback refers too the frames geometry and particularly the front binder positioning in relation too the front of the spring deck and the center of the vice hole respectively ,in simple terms one takes a "standard universal geometry frame" and moves back the front binder position by drilling a hole or making a slot too go back ,,in order too achieve what most of the industry would define as the cutback one would need too do this enough too get the contact screw (given a dead 90 too the timing spring") directly over the center of the front coil ,the dead center of the iron core ,anywheres there or back would constitute a cutback liner frame if you started with a traditional universal geometry frame ,,get it ??if you have any other questions referring too advanc4d machine geometry check out my book ,,"the tattoo machine builders bible "a guide too sacred machine geometry metalurgy and electromagnetics "/thanks for asking ,sincerely chris spearrin co owner of s and s custom irons tattoo machine co ,