Making a set of Ks from a set of Ns can be done but is not a simple as sanding to fit. It would require in addition to fitting wood to metal that the top portion of the checkering border be recut along with checkering being recut in this same area, doing this work will expose clean fresh wood making the area stand out like a sore thumb, resulting in more work needing to be done to blend the new with the old. Not really worth it unless ya just got to have a set and do not mind ruining a set of Ns.
Keith
I agree, the checkering modification for the proper proportion of the checkered field would be required to look right. But if not done, the novice would not be able to tell if just fitted to the K grip frame. To a non-novice, yes it would be detected but then the extra bulk of the N frame stocks is already a dead giveaway.