OP Terran Frigates + fix trader drones (now trading on stations work correct). 

You don't need to start a new game.
It is enough to simply replace the model from the Terran Frigates mod, sell all the equipped (installed on the ship) equipment and buy/install it again, then everything will get up in a new way.

Akita now heavy escort military ship.
Kitsune now heavy military transport.

Original mod here: Lint5 Terran Frigates

Updates:
v2.5 - Few corrections.
v2.3 - Kitsune removed 2 L cannons and add 4 M cannons. Akita removed 2 L cannons and add 4 M cannons. Kitsune and Akita storage capacity reduced.
v2.2 - Trading fix (Again - my falls).
v2.1 - Kitsune launchers is back!
v2.0 - Now compatible with 6.0. Change turret groups, change position some turrets.
Now Kitsune have 30 M turrets + 2 L cannons + 2 M cannons or launchers (Lint launchers not compatible with 6.0 yet).
Akita have 20 M turrets + 4 L turrets + 3 L cannons.
Kitsune and Akita now have 4 L main shields and 1 L shield in engine group.
Changed cockpit on argon (lint cockpit not compatible with 6.0 yet). 
v1.5.1 - Missile launcher fix.
v1.5 - Updated for 6.0 (NOT WORK YET) some fixes.
v1.2 - Akita: + 2 turrets (down) and changed turrets groups;   Kitsune: changed turrets groups.
v1.1 - fix price Missile launcher and torpedo cost (now price isn't 0 Cr cost).

Have fun. ;)