Review on 💪 Boost Efficiency with the Proform 66785 Piston Ring Filer Manual by John Roberts

Absolute bullshit. When I first took it out of the box, the wheel rocked back and forth. I tested it on a used piston ring before installing the end play on my new rings and it stuck. They all stopped spinning together. I removed a small plug to see if I could put some WD-40 on the shaft but no. It was of no use. I tried to remove the shaft that the grinding wheel rides on and it was bonded to the metal case. So I took a 5 pound hammer to try and knock it out and nothing. Super tight. I knew I wouldn't get my money back after damaging the threads on the shaft, so I took this 5 pound metal cased hammer, smashed it up and threw it away. This is my therapy session. Do what you want, it's your money. But I will buy something more expensive and better quality. I didn't spend $3000 on an engine block/rods/pistons to save at this POS. I tried it, it didn't work. Go on. Much luck.