It’s not a good idea to balance the wheel as it is…on it’s 25 mm shaft. Bearings of this size have far to much friction so what I do is temporarily mount the wheel onto a smaller set of bearings (10mm) that have a much lower (relative) friction.

Above: I don’t have any small bearing left so we had to ‘borrow’ the pair of thrust bearing from the lower blade guide assembly.

Above: OK we have a couple of small bearings, now to find a shaft.

Above: A large Philips head screwdriver will do nicely.

Above: Screwdriver clamped down and the wheel mounted on the smaller bearings, we can nor proceed with the actual balancing.