Okay, so an update relating to my SJC M&P magwell. If you are using Taylor Freelance expansion baseplates, it may behoove you to add some relief cuts on the magwell to accommodate the base plates' assembly screws. It may just be that I get a little over zealous with my reloads, but I have a problem with the screws hitting the magwell before bottoming out in the magwell. The impact is also enough to knock loose the loctite in the screw threads; not a hard fix, but it gets tiring.
Anyway, pictures show the cuts prior to refinishing to make it easier to see.