+1 to everything K.C. mentioned.
If I were you and was not sure how old the rigging was, I would replace it. A set of stays from D&R is very affordable compared to a toppled mast. I would especially replace it if it is still the 3/16" rigging. The consensus is that that size was never really stout enough. If you buy new rigging locally, make sure to ask for 1/8". When I bought my boat I had the older rigging and the diamond stays in place. I constantly was worried about it because I just wasn't sure of it's condition, but it sure had a lot of "memory" bends in the wire when I took the mast down. Finally a single wire in one of the shrouds broke and I knew I had to bight the bullet. After the new stuff went up, I felt silly for not having done it sooner--it took care of any fears I had. Removing the diamond stays really helped as well. The mast bends more now and the sail shape improves as a result. Putting the new stuff up is easy--comes the precise size you need and all clevis pins fit the existing tangs. If you're concerned about how easy it will be to adjust, be sure to buy the full turn buckles. Make sure you inspect the rivets in the tangs, too. While you are at it, you may as well replace the spreaders with the higher strength ones from D&R as well. I couldn't tell you how many times I bent and broke spreaders until I bought the ones from Rudy. The ones he sells are worth twice what he charges considering the aggravation they have saved me.
I keep my rig pretty tight too, but I don't know exactly what it is. I'd love to have a Loos gauge, but so far haven't been able to bring myself to putting down the dough for a tool I will use so little. I just need to find someone in the boat yard that will let me borrow it!