I appreciate your logic of spending the $ on new parts etc. I got agitated twice a year having to pay lots of money to step the mast.Honestly it's the cost.
If Its not a necessity, to take it down, I'd rather use that expense on another part of the boat.
I was working off your comments about the integrity of the halyards to accomplish the climb safely and your comfort level of being up 50 some feet above the deck. I’ve never climbed a boat mast but have been on silos (that didn’t move either) and its really not a lot of fun (or I didn’t find it so anyway). Walking 50ft on the ground is simple, looking down the same distance dangling off a rope is not identical.
Going up for an inspection or a minor repair is one thing but you seem to have a list of things you want to make right so you might feel like a it’s a lifetime up there and possibly get in trouble if you are nervous.
Working on the ground at your leisure where you can check absolutely everything shrouds, spreaders etc has a “value” as well.
Just sayin.