nowt wrong with that as long as ya happy
you could just use that as a harmony and stick on another sax track, might be interesting
i think there are quite a few "standards" that no-one knows the right keys for:
Summertime, Autumn leaves and all-the-things-you-are spring to mind,
all guaranteed to start an argument at a jam session.
your Alto & mouthpiece combo sounds good, Davey, and nicely recorded.