Thank you for a feedback man. I faced an other problem (today) when I was trying to make PH_CHAR change it's BBOX size, to make player crawl. I know that I need to unregister entity from the PhysX before changing the size of the BBOX and then, register it back after a frame, that's what I do as well. I used physx visual debugger to see, if my script works. Problem is, that I only change the "min_z" size of the BBOX, but PVD shows me that shape has changed from both size (symmetrically). I've made a picture to show you the problem:

I guess this is some kind of problems you are talking about (converting coordinates between gs and physX). But how could I fix them myself?

edit: reuploaded image!