Suddenly I realized that all this time I glued the [20-234] Marauder II reseen incorrectly - instead of gluing pelvis detail to the torso bottom, where small round pin is protruding, it better be mounted on the back panel, between torso boxes and bottom edge!
This will make too tall quasi-humanoid mini into "proper" squat chicken-style unseenish look.
This is look from the back on working area:
Leg linking part shoud be glued over the grills (which You'd better to sand off or cut out by razor knife)
I'd tried to do it on my ancient, painted by Tamiya paints mini (It's look soo bad now, that I have no mercy for it), and as I see, now it look better.
Upd: resurrected backside photo