I have Aslain's 1.4.1.1_03 installed and when installed I am not able to see the IS-2B with 100% crew with Brothers in Arms I recently bought in the Premium shop.
When I bough it I got a notification in game about a new garage slot and a second notification about the new crew, but I can not see the tank in the garage when I have the mod pack installed.
I need to uninstall the mod pack i.e. replace the original empty "mods" and "res_mods" directories in order to see the tank/be able to play it.