[Captain Kwok]

Originally posted by Atrocities:
Federation frigate requires level 4 not 2 as expected (This is not a bug, it is how Kwok has originally planned it since this ship gains access to the Defiant mount. (Very powerful)

Not quite. The typical frigate in the original mod was available with Level 1 Ship Construction. The Defiant also only required Level 1 Ship Construction, but needed some other much more advanced techs before it was available for construction, i.e. pulse phasers, advanced military science etc...