It's finally done. The last major bit I had to build were the exhausts. I gave up on trying to make them identical to the ones on the Forgeworld model. The curves and bent tubes were just not going to happen, but I think what I built is a reasonable substitute.
I added a little ammo rack in the back.
The command console was made with a push mold and green stuff.
I made the barrel expandible so that it can be played as either a basilisk or medusa.