I’m using a file, a Spyderco Sharpmaker, and then a strop with stropping compound.
The strop and compound took things to a whole ‘nother level of sharp. Before, I could get stuff sharp enough to shave/scrape hair off my arm, but with the strop I got my Grizzlys sharp enough they just slicked hair off. I really probably could shave my face with them.
I think the Sharpmaker is technically off by a couple degrees, but it didn’t seem to matter.
I did take a 6″ piece of hard wood dowel, drilled a hole in it and put a screw in insert in it. It was handier than sharpening the broadheads while they were mounted on a 31″ arrow.