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The second side is a repeat of the first.  This time I did the back cylinder first because of a rear case clearance issue I had when I did the other side. The first two pictures show the cylinder near top dead center (TDC). The second picture shows the markings on the prop hub. The one on the right is the TDC mark. Your cylinder is at TDC when the mark is aligned with the vertical axis of the case.

      Each piston is taken apart and cleaned, oiled, rings set to the proper alignment and then reassembled with my ring compressor, not pictured.  The second picture shows the shim and sealant about to be added.