It is kind or hokey but I'm not sure if my flash will work mounted at a 90 degree angle. I really did not want to buy more brackets and stuff as I already had flash zebra components. I normally used reflective and just got a shoot through umbrella. I ordered these a few days ago so I had to figure out a way to keep the flash strait.
Went to the local hardware store and got a this. $2.00 They come on 90 degree angles etc.
It fits perfectly in here.
I put soft sided velcro on so that it would not scratch the flash, particularly the focus assist beam area.
Looks like this.
Final results. I have the opposite side of the velcro at the front but used an elastic at the back because of the focus assist beam area. Still working on that. It is pretty stable. I could not knock it off bumping into it and once part of it is inside the umbrellas diffuser screen even better.