Fortunately balancing and polishing wasn't too long so that was done in one or two hours. Neither was it too hard to get the prop back in place. This time I fitted two Teflon washers to the prop shaft. Before the prop shaft had too big wander and now I actually have Teflon washers to fit in.
Here are some pictures of balancing, polishing and mounting the prop:
Anyway it was interesting to do this