Thanks a lot for your help with this Eddie.
What exactly is that piece that I tried to describe in point 1 of my original post? I did buy a book on T34's and although I found pictures of it on some models I never found any reference to what it was called, what it was made of (some look wooden/some metal), or what it did.
I have seen similar on other later model soviet tanks but again no mention of what it did...