Hello This blower housing was in tough shape! So I took out the motor. All but one severely rusted housing bolt came out after wire brushing and soaking with the PB blaster. The last bolt took the air cutter to cut the head off and then drill out the threads and tap a new bolt in. All but one of the rusted hub nuts came out easily, the last one need the vise grips to give it a little push. The impeller collar was rusted solid and the wire brush and PB Blaster did no good, the allen wrench just stripped the set screw. The air cutter did the job again! See pics. Here is a video of how the motor sounds. Does anyone know where to get a 4-3/4" impeller blade cheap?