Hi...these are my macro rigs for now
the first one is 100 macro with 430EX II diffused with lumiquest soft box. The othe one (which I used most) the MP 65 with MT-24EX twin flash and diffused with gary puffer with secret ingredient inside
I like your standoffs for the twin flash heads, I have been looking for something to do just that for some time.
Going to let us in on that secret ingredient?