Hi Dave:)
Actually, the mod you made brings that part closer to what it should look like....
http://pblinov.narod.ru/galleries/tanks/3476/stz42/target48.html
One thing to note though, the rear diff covers are too small on the CH kit. They should be much "beefier".....
http://pblinov.narod.ru/galleries/tanks/3476/stz42/target38.html
The welds around this cover are also missing on the CH kit.
Best regards,
Scott