I have 2 Ritter Grips with Cuscadi and Wilkins scales on them. The Grip, to me, is one of the best knives out there for ergonomics, strength, lock and value... until you put custom scales on them and then value is out the window...
Both were much easier to aquire than I figured they would be. Quick responses to emails and failry quick delivery. The Wilkins come quicker because he only sells what is avail in his stock. The Cuscadis are all special order but that means you have a much wider variety to choose from. I'd order from them again in a heartbeat. They are pricey and you also have to consider frieght because they are overseas.
I think a Ritter Grip with custom scales moves this model from working mans knife to superknive. I've had some robust blades and I would easily put the Large Grip with the Wilkins scales up against any of them.