I have used the Hobie catalog to get a good idea of what to use. http://www.hobiecat.com/support/pdfs/08_9-11.pdf

There is a thread in the open forum that had some good info in it as well as some pictures that also showed the setups for the trapeze.
http://www.catsailor.com/forums/ubbthreads.php?ubb=showflat&Number=154333#Post154333

Hope this helps some. I'm too new to the trapeze to answer questions personally.

Kent