Federation Commander

For the Nova conversions of SFU ships, I've gone with a set thrust rating equivalency, depending upon the ship's classification:

Battleships = 3
Dreadnoughts = 4
Heavy Cruisers, Battlecruisers = 5
Fast Cruisers, Light Cruisers = 6
Destroyers, Frigates = 7

Most ships will fall easily into one of these categories. However, I'm curious if experienced players have thoughts on other ships that should have thrust ratings higher or lower than this chart might indicate?

I would give some consideration to the light dreadnought class ships ("fast dreadnoughts") and the weird but popular one-offs, like the Federation Fast Destroyer.

As a rule of thumb, anything "fast" or "light" will have its speed increased by one. Likewise, anything "heavy" would be reduced by one.