If the Practical Sailor is to be trusted (and I do not know any other source of info with the same degree of thoroughness)...
I agree on Practical Sailor, they've been around a long time and have been thorough on most things I 've read.
Sanding the bottom is not the worst thing in the world, just dirty and leaves your muscles complaining--better yet that you only had to do light sanding. It probably helps that you are keeping up with maintenance regularly.
As to my rig, it looks like going with CSC on tacky epoxy will work out just fine. I'll only do one coat for this season and then put on a new coat in the spring and look for some other complicated and expensive way to improve what ain't broke! After I read enough on boat electrical wiring, I may redo the system in the mast next year.