The LR turrets may be too small but this is rediculous. It would probably tip over if going down or across a grade. It looks like a pregnant whale.
The paint job is very spotty too. The light grey that's been dry brushed across the surface doesn't look like it was done with any attention to highlights.
Cool conversion. The weathering looks a bit haphazard - are those lighter marks dust from the ground, or abrasion from something? They look a bit like snowball strikes!