[bts]

During impact:

the "vertical hinge" adds loft (vertical angle) to the clubface with the minimal change to its horizontal angle, which I use for higher trojectory and leaking/weaker shots (really tight lob or sand, high pitching, high slice w/open stance), or putting sometimes.

the "horizontal hinge" reduces loft (vertical angle) to the clubface with tremendous change to its horizontal angle, which I use for lower trojectory and compressing/stronger shots (regular full shot, draw, hook). No short games, BTW.

the "angled hinge" does the least manipulation to the clubface angles (both vertical and horizontal), which I use for (regular) putting, chipping, sand, punching, or fade.

For an extremely low trajectory shot, I do "reverse vertical hinge or hooding", which reduces the vertical angel of the clubface during impact, yet maintains its horizontal angle.