Drilling a hole, and fitting a plug to the end of the horn are rather simple if demanding tasks. It is smoothing the outside of the horn, and then decorating it that takes the hours. Putting some kind of groove in the top end of the horn to hold a leather thong, or string, does involve careful cutting and or filing. Deciding how to mount the other end of the strap on the plug end is next. Further decoration, dying, carving, scrimshawing are all things that many owners do after they get the basic horn done.