I bought a pair of the Retra Pro Max's with the boosters, neoprene bumpers, reduction rings, soft diffusors, reflectors, macro rings, the works (over $4,000 USD) back in October. I pretty much spent my life savings on these things. I've only used on one trip to Lembeh and I had entire dives where my photo's wouldn't sync as their was an issue with my flash trigger. I ran into low battery issues on the repetitive (long) dives when they did work (for some reason they worked better in daytime than night). Carrying 32 batteries sucked; so this adapter interests me only because I am already so invested in these strobes. That said, I am also just considering cutting my losses and selling them while I can still recover a decent amount of my "investment".