Been using Wolverine Jig and 3450 rpm 6"dry grinder for over ten years. At the time bought my jig, was the best of it’s kind out there.
Some of the newer jigs which cost less also look good just don’t have any experience with them. From reading different reviews, on other jigs still think the Wolverine deserves your attention. The learning curve for using Wolverine & components pretty easy to master.
I have sharpened tools on both 1750 & 3450 rpm grinders, both will blue your tools if not careful.
I would prefer an 8" grinder, but since mine still works won't be replacing it anytime soone.