Re: Aftstay and forestay sag
Knothead is a professional, so I'll let him do the specific advise part.
I like the DIY approach, but I will echo him on one part - for the first time AT LEAST get a professional.
Rigging is an essential part of the boat, and the soundness of it has a safety aspect as well as a large performance benefit.
Check online for owner groups for Cal's - someone out there surely has a .pdf file of the owners manual with the original specifications for the rig. Both yahoo and google host a lot of free user moderated groups like that.
Lessons learned are opportunities earned.