Hi Nick,
Great to hear you say more than "Nice Image"
Your M83 is actually very good. I like the clour balance. The detail is great.
It looks like the DSI Pro II suffers the same problem as the Toucam with the Star Bloat. Annoying isn't it! But you have done well capturing the fine structures in the arms.
Did you use any filters? I am wondering if an IR/UV cut filter might help with the Star Bloat and core burnout.
I like it