I haven't information about that BT-7A were use in indirect fire or not but d'like to mention that in
http://forum.shrapnelgames.com/showthread.php?t=51835 are new icons for BT tanks and I rember that I created new icon of BT-7A tower based on tower schematics which maby beter than this used now in this tank there is even this experimental variant BT-7 with 76mm F32 if you dlike fine tune BT-7A inside game
