Here, this is something that I originally helped AVALMA on for his Royal Netherlands Navy AU that he in turn adapated from some designs I gave him for here, and I have in turn further adapted it for the Greek dive bomber competition. Posting it here in case AVALMA feels there's some copyright contention:
I can't help but think that sticking the engine in the nose would make it look a lot nicer. It doesn't half look odd at the moment. Moving the engine to the nose would free up a lot space in the lower fuselage for a bomb bay, but would likely be quite draggy.
This certainly looks needlessly complicated. It is not clear what benefit is derived by burying a radial engine deep in the fuselage, where the bomb load would normally be. Maintenance would certainly be difficult. Any of the other offerings are far more straight-forward in terms of design, operation and maintenance.