Thanks, that's what I've seen in simulations, it would be nice to see an L-frame measured though, there aren't many about and I think it has the potential to be a useful solution.
We are one of the only companies using L shaped open baffles.
I've been experimenting with reducing baffle diffraction using large round overs and that is effective at reducing the on axis ripple due to edge diffraction.
You are on the right track there.