What vintage Commander? If it's new it will have great sights on it. Why the ambi? Are you a southpaw? Beaver is Ok but hard to do on a lower end that is very expensive to re finish. I carry a '54 LW Commander. I have 8 rounds of 1954 GI hardball in it. I use an 8 round mag but go one light. I think a real good smith could install a Smith / Alexander Beaver tail for you. I did one on a Coltguard Commander and it looks pretty good.I don't know which hollow points eat these feed ramps for lunch so I use hardball. One box of 50 of the wrong ammo and you will go to a ramped barrel. I would not have an ambi on any carry gun. Unless you are left handed, of course. These are frisky shooting guns so I carry mine alot , but rarely shoot it. Lots of luck