The only upgrade or down grade that I have done is put an outboard on the reverse trasism instead of replacing the OMC saildrive ( Upgrade due to better engine, Downgrade due to Resale value and being in Big Seas). When you look at the cost of a new Yanmar or Beta saildrive it is not worth it to replace the saildrive.
As for the Mirage 24 having water leaks, yes you should undo all the bolts in the toe rail and use Marine 5500 in the hole and rebolt the deck to the hull. A time consuming job but one I would recommend. I am doing the same thing to my 275 right now as I am planning on cruising it from Nova Scotia to Maine and back next summer. Then the summer after down the ICW to the Bahamma's.
Last edited by waverider24; 11-01-2008 at 08:14 AM.