Thanks for knowing your stuff lol. Blows my mind all the bad assertions people have made on this piece 
I swear, it's like nobody's played WOT before. The is-3 is VERY hard to mistake for another tank tank. It has a very unique look, you did a great job drawing the dimensions and remembering the little details btw.
Yeah, most of the people are looking at a single little detail and judging the whole thing, missing that it looks nothing like anything else.