Newbie here... I was curious if I had a P30 9mm v3 and a P30 40 v2 LEM if I could simply swap the slides to operate the 40 as a v3 DA/SA? I'd assume P30 frames are the same like most pistols that come in both 9mm and 40S&W. Can anyone answer if this is doable? ... Better yet is there a reason this should not be done??