I was under the impression that I could order a stoptail on a CU24 or a CU22 anytime I wanted. When I run across any stoptails, they are usually CU22's. I can never get the tremolo bridges as low as I would like them to be but the stoptails can get really low. I think I'd prefer a stoptail on all my guitars actually, but they aren't stock and I don't want to wait to get one exactly the way I'd want it made.