Thanks for the shout-out! You are correct about making a Carth and male PC romance mod requiring more dialogue editing than a Bastila and female PC romance mod does, because Carth has more dialogue referring to the PC's gender throughout his romance than Bastila does, since Carth calls the female PC "woman" and "sister" a lot.
I handled the edited dialogue in Carth's romance the same way as I did my romance mods for KotOR 2: splicing VO files to replace the pronouns and gendered terms. Thank you again for your SithCodec tool, so I did not have to waste time in hex editing the VO files needed for my Carth romance mod.