I was also seeking some of these answers.
@
bruceride just bought a Pro, and it does have the lifter hold down.
But it also has the Kick-Off, and is pretty short, but not quite as short as my 391 XTREMA, or my 1301T, and I want to mimic those two, so if I get the 21" Comp I am considering, I will either skip the Pro, or try and trade stocks with somebody who did the Magpul.
One manual that shows the stock changes is here (page 31):
https://www.beretta.com/assets/12/29...cal_USA_OK.pdf
There are four drop settings (50, 55, 60, 65) so I would think you could get one to be what you want. If the gun doens't come with both plates they replacement kit is cheap:
https://www.midwestgunworks.com/page/mgwi/prod/e01630
I also want to change the pad on the 1301T, I want less sticky and will sacrifice some cushion.