Actually, the FF was only in use for a little while, the MG/FFm was retrofitted on all E-3s, so they were almost identical to E-4s except for the canopy.
I'm pretty sure ours is supposed to be FFm, but that's going off of memory from threads in years past, so there's some small chance I could be wrong.
What I'd like to see is the 90 RPG on the MG/FF in the 190A-5, as was common for those later 190As with MG/FF.