So I scored a couple 430 EX II's. With the one I already have, that makes three. I want to use two in a big softlighter, keep the third as a spare. Or maybe add it into the Softlighter as well. I know these flashes can only act as slaves, and it looks like the 622TX is the right transmitter, but do I need a trigger for each of the 2 EXII's, or will one optically detect the other? I think not. How to proceed? Trigger for each flash, I guess??

