I bought a beautiful used Bachman spectrum 2-8-0 in Southern, the 722. She was bound up so I removed the bottom plate that holds the brass pickup shoes for the drivers. It was then that I noticed the frame had a bow to it. The lead and rear drivers were low with the middle drivers slightly clear of the rails. I completely disassembled the loco down to the frame. I found the frame to be spider webbed with cracks. The front of the frame under the smokebox simply broke free with little effort, the entire frame is brittle. The shell, drivers, and side motion show no damage from being dropped, could this be a bad frame casting? For now I am going to search for a parts engine to source a new frame. Any suggestions would be welcome. Thank you.