That is a good reminder, I need to improve my trolly handle too. I will probably just have it coming to one side of the bow. The trolly itself is probably a little short, but that was the length of scrap tube i had.
I am thinking of adjustable caps, but am unsure how much movement is needed at the bottom end of the wire. The current setup is 49er style out to the shroud points, so tension comes from moving the mast, rather than the shrouds.