i love gravos, but i do mine differently. im sure a lotta people know what a waterfall bong is, right? 2 liter bottle with a hole in the bottom, put your finger over the hole so no water comes out, fill it up with water, put on the gravo piece (i use a ratchet piece also, but i put a screen in mine) with the weed in it, have someone light it, and remove your finger. its basically like a bucketless gravity bong. but instead, i put that in a bucket, so you can reuse the water over and over. but what i recently did was i took a hose, and made it the length of the gravity bong bottle, taped it to my gravo piece, and light it the same way that you normally would, but instead, its a water-filtered gravity/waterfall bong hybrid. you get the smoothest hits, and it doesnt force the smoke into your lungs. instead you just have to inhale it slow and deep....hit that a few times, and wait. the high will hit you like a freight train, especially if youve never done it before. i suggest everyone try it. it gets you smoooooth hits