It looks like a great product I noticed there is a water proof version that may be easier to deal with cleaning. Just a thought there. Mine also climbs a lot, many nights he is on top of something I have a branch thing he like a lot also a fake skull he often will be on top of that too. His favorite spot is on top of the the area where the doors slide. I wonder if 'ball pythons don't climb' is not really accurate. Philippe de Vosjoli has said that they often climb low branches, it seems like they will climb if given the chance.

mrmertz what kind of enclosure do you have? It is hard to try to solve how to secure the vine without knowing.