Coaching.....I have a K32 top single that I don't intend to use. It's a 32", all factory and choked modified. I had planned to send it to Briley for thinwalls but the top single just doesn't float my boat. I'm asking $700.00 for it but like all shooting accessories, that's open to negotiation.
I'm not sure if you were one of the guys that e-mailed me about my barrel, but they're thin wall chokes, don't know if that answers your question, but I will check for you if you tell me where to look on them or in the Briley book (I have that, as well). E-mail me or PM me for specifics.