I have built soft loops for eons and am currently doing a hard line setup. I originally bought PETG but after reading and feeling the material I decided to switch over to acrylic. Honestly, I don't know why more people aren't using acrylic. IMHO it's harder to overheat, it is stronger because of its raised operating temperature, it re-bends easily, and it is super crystal clear. I have read about people having fogging/hazing/drooping/fittings popping off with PETG and I am not sure it's the best material. Just 2 cents.