Glad to hear this got sorted. I'd hate to think that you had to resort to a public flogging on SB to get results, but whatever works...
You are right about the Ikes being heavy, but I figure that when I stick them in my Peli case with an Aquatica housing, two D7000 bodies and three lenses (and a flat port, arms, chords, diopter, viewfinder etc.) another pound or two is neither here nor there.
I think part of the reason the Ikelights are very popular here, is that our water is so friggin' cold (39° to 42° below 70', year round) that you need some serious batteries to hold up. I generally shoot at about 2/3 max power and I can literally shoot 10 frames as fast as I can pull the trigger and not have an issue with the things recycling.
Anyway, good luck with your new toy!