Exercise machine enhancements

An exercise machine, comprising:

• a tension generating device;
• a translatable arm mount coupled to the tension generating device;
• an arm coupled to the translatable arm mount, wherein the translatable arm mount permits the arm to pivot vertically at least in part using a first plurality of teeth, wherein the first plurality of teeth are trapezoidal in shape;
• a cable coupled to the tension generating device via the arm;
• and
• a track for the translatable arm mount to slide along one dimension of translation, wherein the translatable arm mount permits the arm to be locked using one end of a pin within one of a set of track holes located on the track, wherein the arm is rotatable horizontally, and wherein a second plurality of teeth are located around at least an arc of a circumference of a member of the arm in a top view of the arm.