Hi all, this is my first post here. I purchased a second hand Sprayborg, it was going well but unfortunately I did not check it out properly before using it and towards the end of its first job it started making knocking sounds, I stopped and found the driveplate was loose and one of the 4 bolts had sheared off. I have fixed it up but since then the machine vibrates more than I would think is normal, especially on hard floors. Not sure it the drive shaft got bent when the plate came loose or if it is just unbalanced. Anyone have any thoughts on this. Thanks