Actually the LHTR Heavy Bombers option only gives +1 to total SBR damage on maps where the xml is configured in a certain way.
In Global 1940, it does NOT give any bonus.
Therefore, it is fully rules compliant.
Ah, good to know, thanks for the update!
How is it in AA50-ww2v3?
I tested it myself and found out that it is wrong in ww2v3 (AA50) regarding SBR.
There “1” is added to the best die.
It should be “take the best die” only.