PBO (Samson Amsteel) is nice because it doesnt stretch at all once the knots are set and you've gotten the mechanical creep out of the line - it gets stiff like wire, and its slippery, its cheap and lasts forever and doesnt absorb water. It wont cleat, so you need to slice in a cover or use a differient line where it gets cleated. Its also not abrasive, so it wont tear up carbon or fabric if you use it to lace a tramp or run it over carbon/aluminum fittings. If you run it through the Bimare rudder fittings it wont wear the cast aluminum and that stuff is pretty soft. If you used Marlow racing it would "saw" through the cast aluminum or carbon. Its easy to splice or you can tie it. Its great stuff, I use it all over the boats I own.

The small amount of line that is release as the line "settles" into the cleat didnt seem to make a differience when I did my rudders. YOu might want to plan for the line having a slight slack when it settles so plan your rudder fore/aft settings slightly forward.

As far as the blocks check out www.apsltd.com, that picture isnt my boat, so I cant give you part#'s, but there are lots of blocks that will work, a cheek block would do it, or you can drill through the aluminum casting and forget the blocks, the friction isnt going to make a differience.

Bill