Wow Thanks guys for all the help!! I am slowly getting this figured out. Ok, so let me get this straight and correct me if i'm wrong. The jib block slides up and down the cable that runs down the tramp. There are either two shorter lines or one continuous line that runs along the rear xbar through a cleat and out to the jib block. But i still haven't figured out what the rope is that runs along the front xbar. From the attatchment of a previous post, it runs through a cleat out to a cheek block near end of the xbar and then connects to a ring on the jib rope. I guess i can see that acting as a jib position adjustment like on the h16. But then what does the rope on the back do? Also, i talked with a guy at the nacra factory and he said you can get rid of the bar in the middle by simply installing four or five pop rivets in the u clamps that go over the xbar. These rivets will keep the bar from rotating in the clamp. I guess the center bar only provides torsional stability. Has anyone done this? I like clean tramps, so i kind of like the idea of under tramp cables. Has anyone done this and what limitations will it provide. Thankyou all so much for you insight. I'm totally stoked to get this out on the water next summer. Hope to hear from you all soon!! ~Reid