An interesting little tidbit of info was mentioned on "Greatest Tank Battles" the other day. That being the JS-II had a really slow rate of fire as the crew had to elevate (lower the barrel) the breech to re load after firing. This got me thinking if the unit should not have a special rule for this situation. I was thinking of something like;
Slow Firing
The unit suffers an extra -1 command penalty for second and subsequent fire orders (ie first shot no penalty, second fire order -2 rather then -1, etc.)
Note: Haven't actually tried this, it was just something that went through my mind when I heard about the problem. As always opinions welcome.