Meat,
I'm sharpening challenged beyond comprehension... I own every danged contraption they made to sharpen stuff...
I finally got a Redi Edge from Ed Schlief on a bet..he bet I could make it sharpen anything & I bet I couldn't. If I could make it work, Ed said I had to buy it.
Long story short, I bought 2!!! It worked. I sharpened everything I could find and all my friends stuff when I visited.... :D
Ed had all sorts of bh's up there at Denton one year he'd sharped with that gizmo, the Redi-Edge, and he did the Griz...but it of course, ended up with 2 sides sharp!
I've done griz like that ever since! And I ask, if it works, so what? Designed for a chisel 1- side sharp and I made it a 2-sided sharp, and like the nice 3:1 profile. Might work for you too!