Thanks, great photos. Very pretty.

I have to say, the box looks too small to me. Maybe that's why you're struggling with not enough bass - too much mid?

Can you post the inside dimensions? There are a number of skilled box guys here, perhaps they can help. And the port size and length is important.

edit:
Hmmm.. looking again a doing a rough estimate, the boxes are not small. Maybe 42Hx24Wx21D.