The head of the Sigma EF-500 DG Super rotates 180degrees if rotated to the left (photographer’s view) but only 90deg to the right.
I always found that limiting, so since I had the guts spilled on my table trying to figure out the sync port, I decided to modify the head rotation of the flash at the same time.
What follows is my own documentation of what I did to my unit.I will not be responsible if you accidentally destroy your flash, or worse, hurt yourself: capacitors in the flash can hold their charge for a long time waiting for someone to poke them the wrong way.WARNING: This hack will FOR SURE void your warranty. This hack also involves permanently modifying your unit.