Thanks for your comments.

The band is open access, anyone can join (no auditions) so the instrumentation is variable and most of the stuff we play is based on four/five part arrangements with each of the parts being available for C, Bb and Eb instruments and it is then left to musical director to allocate the parts to the different instruments. I will follow the same model.

I did consider transposing the whole piece down a tone to Bb & F but it would make problems for the flutes. We are currently playing pieces in keys of C & G (concert) and the saxes seem to cope OK. My understanding is that a piece in the key of G would have to be written in E for an Eb instrument.

I think the answer is to transpose the parts and see how they look and make adjustments as necessary.