Is the Beretta 9000 magazine compatible with the PX4 subcompact? My SC came with one "Snapgrip" mag and one flat base mag. I don't care for the flat one very much. PX4 Snapgrip magazines are pricey! 9000 Snapgrip mags are about $20 on sale on the Beretta USA website. Does anyone know if at least the base plates are compatible because that is really what I'm after? For $20 I would be willing to buy the 9000 magazine and salvage the base plate. My gut feeling is to assume it is the same technology hand-me-downed to the new line of pistols... but we all know what can come of assumptions. Any insight is greatly appreciated. Thanks!