Here's what I ended up with.





That's the F-attachment/neck pipe from a Recording model and an Ambassador bell.
Still need to work on it some. The brace in the tuning slide need to come out so I can shorten the tuning slide (the horn plays flat now). I'm not happy with the way I widened the tuning slide either.
Was thinking about taking it to our resident bloke and have him modify my Studio.
I'd like it to be convertible between the straight horn and the F-attachment. But the tuning slide will need widened on it too.
What do you think bloke? PM/email me you thoughts on the $$$