I raised some coxi (heheh) and they were a handful. I sold them because I preferred not to deal with a snake that exciteable. Also, they are very dependent on high humidity, which is not good for the Great Southwest. They are a beautiful and fascinating snake otherwise.
I think they'll be very nervous when young whether you hold them or not. Biting doesn't bother me and they would bite me every time at first. Then they would stop. I actually think holding helps a little. But I would recommend some changes in husbandry. First I would put a large water jug in the tank because they like to soak and crapping in the water is easy to clean compared to cleaning a moist hide. It also helps with humidity. I would also suggest keeping them at cool temps, ranging from maybe 65-75*F, with bottom heat only for digestion.
Hope this helps a little.
TC


