I have never used an '03 bottom metal. I have heard it can be done just never went that route.
Luckily, all the mark X I have owned have been the older models with the release in the bow. No complaints so far. Grant it it is no saterlee, sunny hill, etc but they work great.
The H&H bottom metal I just picked up is off a mark X. I maybe down a round or 2 compared to some of the good aftermarket metal but I think I can make it work.