There are some things that come with the kit like the priming apparatus that might be handy but you could buy that later if you wanted to try it. You really don't need the kit if you have been at it like you have for years. I find the manual useful as a starting point for research because it has such a large collection of data from other sources. When I find a load I want to try I look for specifics and confirmation in another manual. If I was in your position I'd probably just get the press and as many turrets as I needed to load each caliber and an extra for adding a caliber.

__________________
Trucks and guns.