Here's my solution, Robert: Of course, I have the advantage of having a Lastolite EZYbox Hotshoe on hand. The Lastolite mounting hardware has been pressed into service on more than a few occasions.
In any case, here's what we start with, the Lastolite hotshoe flash mount:
We don't need the ring part of this assemblage since we'll be mounting the business end to a "real" speedring in a moment. Here's the part we'll be using:
To mount this hotshoe flash bracket to my Amvona speedring, I carefully drilled and tapped a 1/4-20 hole into one of the webs on the ring:
Placement of the hole is actually *very* critical because we want the two tiny registration pins on the Lastolite bracket to just peer over the Amvona casting. The pins prevent the bracket from swinging to and fro. Here's the assembled ring and bracket. You can see the two registration pins:
The finished product in all its glory:
And with an ancient Vivitar 283 on board:
So, in my case, one really well-placed hole was all that was required to allow mating a shoe-mount flash to the full-sized, metal speedring that came with my Amvona softbox.
Dave F.
