Well, today Rick continued cutting up to the end of the wood. This came about as a result of drilling, chiselling, sawing and plain brute force. Midway through, I pitched in and we both worked at cutting--or breaking--the bolts going from the frame, through the floor and the "U" channel (a piece of bent aluminum providing an airspace between the inner and outer shells). That released, Rick lifted up the "U" channel, drilled out the front rivets--and the rusted front plate just fell away! I suppose that's one thing we're going to have to replace!