The HydroRight Dual Flush Converter is just a very good product. I have had no issues with it at all.
Is yours ruff where it seals?
I bought two
Water Saver for a 3” valve and the handles are really bad .
I have had HydroRight Dual Flush longer and the handle flushes exactly the same as it did day one but the water savers have been getting worse as they get older.