As the old goat said... let the stones do the work!
Having said that, get the coarsest diamond stones they have!
I've had my kit some years now...and wore out the old diamond stones on the knife sharpener...also have the one for the broad heads with the roller... got a new diamond that is coarse on one side, super coarse on other.
So now have their bestest diamonds for both the Knife and the BH set ups!
Shag08 commented on doing his Grizzly which are super hard, as are many high end heads... hard steel takes a coarse stone to change bevel degrees... I did some on the Knife and some on the BH version, and he couldn't tell the difference...
You MUST raise a wire edge on the off side before moving on or you'll never get full sharpness!
Either the knife or BH sharpener work swell! Stones are the key...along with the patented constant angle control on both type sharpeners!