Seven - hmmm well - not that easy really without pics and can't think of any pics that would show much more than the one we have already on RTW's post.
You will probably find that when new the rig will feel very stiff and possibly tight too - mine did shrink a shade finally perhaps because not bone dry when I got it - meaning say 98% which became 100%! Not unusual.
Place gun in it and leave to sit, and even (my idea only) place a layer or two of polythene inside then place gun - just to get a slight easing. Even carry in pocket at home a bit too before ''real'' carry out and about - body warmth seems to help thinks supple up a bit.
Once gun is freely removeable, really best thing IMO, with an empty gun, is experiment. The double width leather at top is what will allow the thumb a purchase to press on - add to that a slight rocking to rear as gun moves out - and it should come out fine. The rig's shape does help make it ''catch'' in pocket but needless to say - pocket dimensions etc will have an effect too.
Try it when you get it - play around - then see how you go.