Yep, Roger designed the first 588 wedges before Bob started doing his magic. They were very good and widely used until he left Cleveland. There’s a good reason that so many pros now carry Vokeys even when under contract from a different company for their other clubs. As much as you like your new 58.08M, you might be missing out on an even better grind/loft option for you if you pass on doing a Titleist wedge fitting. They can really dial you in on these critical scoring clubs. Good luck!