Gastrick
One of the Dirty Dozen!
Nice Tripper. Is that framework going to stay and be part of the new floor? In the pictures, it looks like it's at about the right height for your 4" channel. I see that you squared the braces. That's a good idea even if that bracing is to be removed later. That way you can check during the channeling process to make sure that the body didn't get out of shape.