D slides

[bigbanddan]

Hi all, I’m currently playing an unmodified Holton TR180 bass bone. Recently I was confronted with a couple of big band charts with some very challenging passages with low B’s and C’s.
A friend suggested I should get a D slide made for the horn. He said it would make those passages easier to play.
With a D slide, what slide positions would the low B’s and C’s be in?
Thanks in advance for your responses.

[tbonesullivan]

If you get a D crook / slide made for the second valve, the low C would be about where 4th position is normally. Low B natural would be a bit past 5th. I think the TR180 has the second valve in a very flat E, not quite Eb, so it would definitely move in the B natural significantly.

[Burgerbob]

The hard part is finding Holton .585 valve tubing to make a slide from.