5th valve in tuning slide

[jlbreyer]

I seem to remember reading here of a Yamaha F (?) that had an optional 5th valve which replaced the tuning slide. Am I dreaming?

My question is: if that is feasible, could one add a 4th valve in a tuning slide on a 3 valve upright, like a Conn 10J? Am I crazy?

[cjk]

Am I crazy?

Yeah.

[jlbreyer]

Ok. OK. I get the message. I'll give up and not post to this thread anymore.
TTFN