+1, thankyou for speaking the truth!
If you purchase the original MAP tank from the right vendor it comes with Polycarbonate tubing.
The tubing used for the jonboyusmc tanks is Lexan which is the same thing as Polycarbonate?
Lexan is a brand name for Polycarbonate.
I have never had a polycarbonate MAP tank tube crack on me. However, I have heard from a couple of memebers who purchase MAP tank from the classified having cracking issues.