Naj,
I could have asked this personally. But just in case someone else wants to know the same thing, I'm asking it openly:

Without concern for condensation, what's the lowest temperatures that this (evaporative) method of cooling is capable of achieving?

I'm not concerned about condensation, because my equipment is already prepared for it. So that's not something that needs to be discussed here. I simply want to know how to best maximize the performance of a bong to the lowest temperatures physically possible.

If you can, please list the components individually that need to be changed. Either in configuration, or their size.

Thanks!
Shingoshi