The front of the head is fitted with multiple anvil location slots, anvil screws and clamp screws to provide ample flexibility. In most cases, the same head design can be used in multiple positions.
Most Thriftforms come with an additional T-slot bolt. Tightening this bolt only allows you to make adjustments without affecting the setup. Tighten the other bolts when the adjustment is correct.
The taper and diameter adjustments along with the quick release nut are at the back of the fixture; out where the operator has easy access to them.