Hi,
The pilot's manuals I have for the Mustang, Spitfire, P-47, P-38, F6F, F4U all state max speeds for lowering the landing gear and flaps or "they might be damaged".
This is excepting the F4U for 10 degrees maneuvring flaps, P-38 10 degrees maneuvering flaps and the P-51 for 10 and then 20 degrees maneuvering flaps. All of these maneuvering flaps can be lowered at high speeds with no damage.
I know brand W had all this modeled. I hope this is planned for future releases in AH.
Thanks,
Richard Ordway