Nope, no mistake subbing in chewie for sara. There are people who are actively making crestieXchewie hybrids with quite a bit of success. And I believe that their offspring have proven to be fertile which raises even more issues for other people.

I personally am not staunchly against hybrids, whether it be geckos, snakes, whatever. But I think there are certain criteria and responsibilities that should be adhered to in these cases.