Hey I have a couple questions about the glass attachment piece that you can buy at planetvape for the Arizer Solo for vapor bonging: 1. What size? (I'm guessing the 14mm) 2. With or without carb? I'm not sure if there are advantages/disadvantages and was wondering if anyone has bought this attachment piece, and your experience with either a carb or no carb. (I dont have a bong yet, but plan on getting a small one)