Many thanks for listening Peter.
I used the electric piano because I wanted a bright atmospheric sound, with lots of reverb.
Think the closest orchestral equivalent is the vibraphone, and it does sound quite nice with that substitution.
I tried to create different moods and textures in the piece: so hopefully it's not too repetitive?
Think the fourth movement is probably the most successful.
For the opening cello passage in the first movement, I think I had Elgar's cello concerto floating vaguely around at the back of my mind!