diamond cross section shaped blades

[outcast27pa]

Hello.  I am trying to sharpen a knife for a buddy and the blade has a diamond cross section.. I have tried to use the KJ-45 but I am having trouble securing the blade in the jig.  The blade wobbles along the long axis and screws up my angle.  Any suggestions on sharpening diamond shaped blades?  Thanks.

[Royale]

What I've been doing with odd shaped blades, is to add equal layers of adhesive tape on both sides to increase thickness/adjust its shape.(I typically increase the thickness for extremely thin blades to raise my jig away from the grindstone)

It really doesn't matter to me if the KJ-45 is not closely clamped to the blade. As long as the blade doesn't wobble during sharpening, I was never affected by a wide clamp holding a thin/odd shaped blade.

[kwakster]

Original first model French paratrooper dagger from the 1950's and/or 1960's.
On the steel guard it reads "Poignard de Combat" and "Special Beret Rouge", which translates into something like: "combat poniard for red berets"

Most likely the main reason this Red Beret dagger looks like it was never used or even carried is the fact that it had only rudimentary edge bevels that weren't even apexed, and it also only had a narrow rounded section where originally a sharp point is supposed to be.
My guess is that it must have slipped the final quality control, or the worker just didn't care enough.

I used my Tormek T7 wet sharpener and a home made small knife rest to create what looks like narrow factory bevels nicely coming together in a symmetric and needlesharp point, making it fully functional again while at the same time preserving that untouched appearance so it looks like nothing was done to the dagger.
Taping the (disassembled) blade is also essential to avoid any faint surface scratching















Specs:

Overall length: 11.89 inches (30.2 cm)
Blade length: 7.08 inches (18.0 cm)
Max blade thickness: 4.82 mm
Steel type: drop-forged carbon steel
Handle materials: steel guard with blackened brass handle (can be disassembled & weighted)
Sheath: black leather
Weight without sheath: 261.7 grams
Weight with sheath: 300 grams