Apart from the folding leaves the standing rear sight is perfect, JT would love it, even though he didn't like any extra folding leaves. Seems to be plenty of metal there to allow you to file both the V and the shoulders. My own English style rear sight on the .404J also has all the extra leaves but I'm not about to remove these off an Oberndorf Sporter.
Yes I would certainly stick to the same sight picture that you have used for pistol shooting as this is probably what will come naturally to you now.

Good luck and let us know how you get on.