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To clarify, there are two plastic pins on the newer mirage drives that can be trimmed off to fit older boats and inflatables. These are alignment pins that were added to make installing the drive faster and easier. The other upgrades to the drive from 2002 are the roller bearings which are not ball bearings but actually rods constructed of an engineered plastic and are corrosion free. The drums at some point were reinforced where the pins go through for length adjustment and the newer spine has a different design that keeps water from splashing up through the well better. I think the only other difference is that the sprockets and masts are now threaded where they originally had a set screw. I may have missed something but hope that helps.
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