|Photo #1 ©Tommy Huynh|
This adaptation has the versatility of axial rotation of the mounted flashes because each is mounted in its own ball head. This adds to the cost, but allows flexibility in the orientation of the flash sensor eye if used in the SU-4 or optically triggered remote mode. This would obviously become academic if a radio controller/remote system is employed.
Depending on how handy you are, either of these solutions can be made to work. I just thought that Mr. Huynh's solution was brilliant!