I picked up a trashed aluminum cannondale 3.0 mtb frame just for the parts still on it. It has a large dent and crack in the right side of the seat tube just above the derailer clamp. I was going to toss it but after stripping it and feeling the weight I'm kind of tempted to see how it rides as is. The rest of the frame seems fine, straight, and really robust, especially the huge downtube. Anyone have any experience with this sort of thing? It seems like of all the places to have damage to a frame, the middle of the seat tube might be the least critical.