A very first seed that grew up as the FHSW mod, was a map created a one year before FHSW v0.1, called midway_d. It featured a naval battle engaging pseudo Graf Zeppelin carrier converted from Shokaku, Boulton Paul Defiant imitating the Blackburn Roc aircraft etc.
I wonder if anyone of us has seen this map, I first discovered FHSW with v0.4.
If you stumble upon active enemy bombing request radio box, you may kill it with knife. Usually it's better to stay silenced at enemy's rear especially that explosives do not really make a damage to mentioned radio.
By pure luck I found out that you can destroy the Piper with a knife if you hit the engine. But that's probably a bug.
If you find the time can you please collect all tips in the OP?