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Seems the use of a ring compressor/installation tool would take take care of the problem with the inner expander piece (?) The end gap of each ring/ring component should be checked in-place and adjusted (filed) if and as necessary.
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Not too relevant: Ford made 3 and 4 ring pistons. Not Ford pistons ? Ford Manual indicates in both 3 and 4 ring pistons, one could have a 2 piece or 4 piece oil control ring assembly. In the 4 ring piston, the upper 2 rings were compression rings, the 3rd ring set contained an oil control ring, expander ring and two steel sections; the 4th ring was a single-piece oil control ring. Some replacement sets contain a bottom compression ring and some choose to omit that to reduce overall piston friction. )