What do you Global knife owners out there use to sharpen these knives? I
have the G-4, which is ground on both sides, and the GS-4 and G-11, which
are both right-handed, and only ground on the right.

Many thanks,
Juan

P.S. There were many great responses to my earlier post on sharpening
knives in general. Thanks for those, but here I'm referring specifically to
Global (or similar) knives...