Qob'nuH
Klingonfanatic
The Northern Star
Specificly for bashes related to the thulls/gany firehawk, cormorants, sparrowhawks (or senator) and such.
IIRC, Thulls is listed in the permissions thread as only needing credit in the read me.
If you credit Ganymad/Atrahasis for the texture bashes most recently applied by Qob' nuH to Thulls' Firehawk/Sparrowhawk I think you should be fine. Ganymad hasn't been around in a long time and he was always cool with using his stuff as long as credited properly. The same is true for Atrahasis for his old ships/textures. Anything new by Atrahasis should be run by him first before altering his work. His old D2 RBB texture set seems to become one of the standard TMP texture sets for Romulans in general.
I don't recall Qob' nuH having any prohibitions about altering his kitbashed work (e.g., Winged Defender to Teratorn) but I'd double check in the permission thread or e-mail him. Check in the Teratorn model read me first.
I'm not aware of any problems with The Northern Star had about modifying his work but I'd probably e-mail or PM him. Also check the read me file for any information there.
Since I don't make models or textures, I have no problem with tweaking or redoing anything I've done so long as the original texture artist and the ship builder are properly credited in the final read me.
Qapla'
KF