Ah, there's an idea. The special designation for ship class hadn't occured to me. I'll try it. I extracted the specs for all of the tugs and light tactical transports from FireSouls OP+refit shiplist and matched them with the models. They all were TG for special role (TG = Tug?). Looks like experimenting and guessing will have to do. Thanks for the suggestion.
BTW, since I've finished the final version of my SFB mod I loaded all of your scripts to see how they play. Look forward to seeing how they worked out.
Great big Qa' Pla at ya.