The IBS is a 650 soft bag, I have mine wired with a separate pump.
Factory Mojo is 650s rear 500 hard tank upfront.
Jester is pretty correct, Although I can get out on a wake board anytime I want, I just suck mice nutts at it. I just have not been able to get the whole thing down.
I can ride switch, side slide, transition in and out of switch and I ride mostly on the Port side of the wave and in the middle. When I go starboard I tend to feel off balance and crash pretty soon LOL.
I do get out and wake board a few times per year but I prefer Surfing. I have been trying to wake skate more but I am having problems getting up.