Juan Pons , May 07, 2002; 12:29 p.m.
I would take a look at the kirk Brackets.
I use the FB6 with a tiny Giotto Ball head ($10) and it works great!!! They also have some 2 flash brackets that mount on a tripod collar, which is more desirable than mounting on the camera mount.
Beware that you cannot easily use two FB6 since the mount on the bottom of the flash bracket is oriented at 90 degrees to the arca-swisss clamp.
There is also the Shape-Shifter system from Wimberly, http://www.tripodhead.com/brackets.html I think this may work for you , as you can buy different parts and put them togther as needed.
I am curious about the Lepp System... I have never seen it. Do you have a link some to it?