Front view.

Rear angle

Looking in.

From the right side.

Upside down, to see the bulkheads. Paper backing still in place to avoid srcatching the bottom.

False panel, with teeth in the center. 1/2" bulkhead returns are threaded for locline fittings. Durso cap is visible.

Rear section is 3.5" wide. Twin reinforcement cross braces help maintain the false back panel to avoid bowing.

Bulkheads and plumbing.

Durso, needs to have air vent drilled.

One return (right rear).

Other return (left rear).

I put a top flange on the viewing area, and a black lid on the plumbing section in the back.

Done.