What is the diameter of the pole/rod holes?
I have a fiodiox octobox 60" but no Speedring and it is in great shape that I need yor speed ring as long as it fits.
The size of holes are about 5/16ths of an inch. They are spaced in correct locations to support an Octo-box as well as a squar or rectangular, (what I have) They do pivot for light pattern adjustments.
Hope that helps.