Thanks for the info. Another variable just entered the picture. I acquired a second set of plans that were the actual ones used by by friend to a pair of K-horns. This was in 1956. He remembers getting the "newer" dyi set many years later. The old set shows more parts, more bizarre angle cuts, and is 32.25 inch wide. The newer version, 1964ish, claims to be redesigned for ease of construction as has all the same exterior dimensions except the width- its only 26.75 inches wide. Depth and height are the same. The layout is claimed to be a scaled down Patrician layout. Although the older plans are probably standard K-horn dimensions, the newer set are FAR better designed for building. Fewer parts,photos and the step-by-step instructions make it a more likely successfull and less frustrating project. And both plans do show a 6inch wide slot. I guess Ill build the newer one w/ a k-33 and use a 3inch slot since I dont have the time to search for a good cond. EV or Stephens. Im scanning both manuals and if anyone is interested in a copy or maybe would like to post them somewhere, let me know. Thanks
taylor