Ship modding - Cannot build new ship

[Aethryl]

I modded the battleship shiptype (increased cost, less of a speed penalty) and the human race battleship template and it worked fine in game. I then got a bit ambitious and created a category, massiveship that I then linked to the battleship shiptype. I went into equip.all and created new versions of everything but missiles (no missiles allowed! i.e. I'm lazy) for massiveship.
I started a new game.
Everything seemed to work fine. My AI opponents build the new dreadnaughts and used them. I designed my new dreadnaught (26 grav upkeep!).

But when I go to a planet to build it it does not appear on the list.
If I go back into shiptype and change it back to giantship everything is fine.

I cannot find the function that allows build new ship (text file 559?) anywhere in modkit and am at my wits end in how to build my new titan.

[Firefox440]

From my point of view, you do not need touch the .a files from modkit. Because my head is a bit bad and you do not explain things too clear, I am not what you made. Have you made a new ship in the ShipBody.all with a new type in ShipType.all? a new shiptype will be unlock by some tech.