A good plan, but you're losing a lot of THC. I read is some NIDA report about THC transferral that only 5-20% of the gross THC in the marijuana bud gets to you in an average bong hit. You add more tubing, and more chambers to that, and you're getting even less than that, man.

I'm not saying don't do it. I'm just saying that's a con (devil's advocate, so to speak). I use ice in my bongs, and they're all hookah-style. Nothing's better than a vape hit drawn through ice water. It feels like opening the freezer and taking a deep breath.