That's great that you had a 75% success rate breeding carpondro with gtp. The general rule with all animals is that the further separate mates are up the taxonomic rank, the less likely you will have viable offspring. the gtp, jungle and diamond (which is the cross that makes carprondro, afik) are all of the genus Morelia, so far more likely to work than crossing to animals of the same family but different genus. while some people may find it fun to muck around with hybrids, it is probably best left to the experienced breeders (or not at all imo, if anyone wants my opinion, which they most likely do not) Good luck OP, I hope some of the info posted here helps with your decision