I was gifted a rainbow d3c serveral week ago. The person that gifted it to me bought it at an auction several years ago. It runs and sounds good just alittle bearing noise and has all attachments. I decided to tempt faith and take the motor apart for a good cleaning. Hardest part was breaking the hourglass spacers loose. Not bad just dirty till i got to the first stage. From then on RUST. First stage and fan bearing plate and metal motor housing rusted. Didnt go past bearing plate cause those screws are rusted and i was disgusted. From looking at the outer plastic motor housing it looks like it was upset while it was running. There alot of black crud on two the the plastic housing sides. My question is is a rainbow d3 worth the money to put a new motor in it?