Manufacturing processes have changed over the years that resulted in lighter hulls. The red glue models were so light the factory was putting lead weights in the forward pylons. The few who discovered that little trick simply pulled the foam plug out and removed the lead.

If you have an older boat that is close to minimum weight, go with it. Next step is make sure the crossbars are not flexing as the pop rivets will wear. Replace them as needed. Then it's time for new hardware. I'd do the following.

New sails - They get blown out. Period. It's amazing how your boat speed will improve. There's a number of schools of thought on where to place tell tales. Once you decide on the best location for you, have windows installed.

Harken low profile blocks for the main sheets.

Aussie 3:1 jib halyard.

Jib outhaul system.

Double trap setup if you don't already have one. Don't use dogbone rings unless you like getting hit in the face.

Forestay bridle fly. An excellent tool when reaching.