I don't have the lowtech head models, so the other ones I have seem to have issues with normal head models. If anyone has those or any others and want to send them to me, I'll upload them and the other ones I have that work with them.
I checked and posted the ones I have in the 2nd post, I'll post more if I find / get sent more. These are specifically Lowtech (Jp modder).
I also have the lowtech idle mods I updated for elvaan and hume, but I still need to do more testing on those to make sure they don't have crash issues.