Welcome to the Strelets Forum. Please feel free to discuss any aspect of 1/72 scale plastic figures, not simply Strelets. If you have any questions about our products then we will answer them here.
About the mongols, we read in the Osprey and in an old Soviet book I read that Nevsky made peace-agreement with mongols before the battle, so we decided to make more colourfull the diorama with this possible element.
They are the 'ungraded' LW figures.
Here you can see an article and photos about how I repair them:
http://www.freeweb.hu/saswargame/index.php?type=article&value=26&article_language=eng&language=eng&filter=author&first_image=1
I had forgotten about those LW figures. I actually read your article before and considered converting them. But as you said they are quite expensive for having so few figures.