Dimensions are 17"x15.5" for the sock and I guarantee you will never have to go to the front of the tramp for a hang! It works.
The jib sheets run thru blocks attached to swivels, then clipped to a cable (w/stops) tensioned with a small turnbuckle that runs from one tramp hook to the other side. I found the jib will luff really bad when pointing if I cleat the jib off where Hobie recommends. Not very efficient. The way I have it allows me to just unclip it and move to another location to open the slot. Though, I must admit, I never have and would never even sail without the jib. I just finished the new jib today (picture attached) as the yellow one was just a prototype I made for about 15$ of ripstop nylon. Blew out quick. New one is dacron. I know the luff is 150" and the foot is 50". Can't remember the leach. Going to be exponentially more powerful in the 15-30's I normally play in. Finished installing the new low profile Harken ratchet blocks (designed for the Wave), 22mm Harken MS traveler, posts to lace the back of the tramp (classic), shortened the shrouds w/longer forestay for maximum rake and block to block on the main. Just gotta finish tightening the tramp tomorrow and she's ready to go.
I want to go so bad I'm totally freaking out! It's been blowing for weeks here and now it's supposed to be dead air for a week. Figures! Water's brutally cold right now. I think I saw Lake Champlain was in the upper 30's. My suit is only rated to 50. http://www.flickr.com/photos/dunbarphotographic/8683988445/in/photostream