Hi, I'm new to the forum and hope somebody can help. I'm restoring a constellation 858 and working to restore the floating action, it's rather anemic even with the motor filter removed. I was looking online and noticed one in a video that had a thin real in between the bottom (motor housing half) and the top motor plate. The top plate fits snugly and if a seal goes there it would have to be thin so not to raise the top plate from the base resulting in a loose motor suspension in the rubber grommets. I've indicated the lactation of the possible missing seal in the photo between the arrows. If a seal goes there it could explain the weakness in the floating action due to an air leak. The tolerance is so tight that I question if a seal could fit but one in the video left me wondering. Can you help?

