Working on the TOS-Era refit of the Columbus.
-Deflector 25% smaller
-Swept back pylons
-Impulse engine where it is located on the Constituion
-Laser banks upgraded to the more powerful Phaser banks
-Fission (fusion?) torpedoes upgraded to Photon torpedoes
-Other minor differences
Undecided if this ship would see a TMP refit. Also did a size check and the Constitution is 2.5x bigger than the Columbus.