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Having waxed lyrical in another thread about focused stress points on exhausts, I thought I would prove my point AND show how retarded I can be when the mood takes me. Having discovered the spring had broken on the pre-flight today, I chose to nip out the additional slack.... this left almost no flex but I was desperate to fly so what the hell. Looking on the bright side, my welding on the previous fracture was stronger than the base material although looking at the break, the heat affected zone may have hardened....? One and a half hour with not enough flex is all it took. The silencer started clipping the prop... This is where I went full retard, I thought a redundant wire I had tied off had come undone and was clipping the prop so I thought I would attempt to limp home. Bad move, it was clipping the exhaust which fatigued the baffle which came out. The baffle cut one tip off and took a chunk out of the other. I can build and repair anything on this machine dirt cheap... except the prop... maybe its time I made a copy machine and bought some wood. It was a nice flight up until this... I had a 10mph SE over a 10mph NW sea-breeze... tail wind in any direction