I went and looked up the Gatco, and I see what you mean. I have a smiliar device made by Lansky called a dog bone, smaller than the Gatco and has a built in angle guide on the ends to aid sharpening. I think I paid under $3 for it and keep it in my PSK for touch ups if needed.
_________________________
No, I am not Bear Grylls, but I stayed at a Holiday Inn Express last night and Bear was there too!