haddo,
oops, i missed the last bit about the serrated knives...unfortunately i'm not sure if either of the tools i mentioned above would be any good for those. the spyderco sharpmaker seems popular for the serrated knives, but it's not very portable. you might also check the diamond section on the knife center link i sent you, i think there are some thin rod diamond hones that would probably do a good job on the serrated knives...might be a little puny for a khuk tho...you could always give it try.
later,
e.