Dangerous Cat/Snake Mix?

[MD_Pythons]

I'm not concerned about it being able to lock - the locks are all fine and secure. I'm concerned about my cat jumping onto the wire top and falling through (which could injure both animals in itself). However, there's no way I can make it sturdier without having to sacrifice a heat lamp (which I very much need since out house stays at 65F year round).

If you must use that Exo terra, why look into installing a RHP? That'll solve your ambient temp issues and you won't need to fiddle around with heat lamps and CHEs. Bob at Pro Products can help with that.