Originally Posted by KadenJames
Well the ones from NineBettas are HMCTPK. Since the female has more influence on the form of the offspring, you should start with a homozygous HMPK male and a CTPK female. You'd get a small amount of PK with extra branching, probably not quite reaching HM, with web reduction. Take the female with the best branching and web reduction, and breed back to the HMPK male. The caudal would be improved but not perfect, so you'd continue to selectively breed until you have your HMCTPK. Unfortunately it'd require culling, culling and more culling.
True about the culling, selective breeding is when I wish bettas had smaller spawns. Oh well, even without a full 180 spread I think they're stunners.