It's not up to me, but there are a couple of circumstances working against you ...
1. The StuG Ausf A, B, C, D and E were specifically excluded from this build.
2. The StuG Ausf A, B, C, D and E were specifically excluded from this build.
I realize that the 2nd point was the same as the first one, but it was such a good point that I thought it was worth reiterating.
That, and there was no participation by showing us progress of the actual build, but that's besides the point.
It's a very nice model you made, though.