Looking at where the top assembly bolts onto the uprights of the base (the four main countersunk allen bolts - two each side of the top), are there spacer washers that fit between the top and the base? If someone has one of these machines could you take a look for me? The exploded parts diagram in the manual doesn't include the top fasteners.
The reason I ask is that I needed to remove the top assembly to overhaul the mechanism and when to top pulled upwards off the base four thick nickel-plated washers dropped out just as the top came free.