@RUDE BOY @PNWMMJ ... I have found the only way to get an efficient extraction with the EV-2 upright is to load the bowl by sucking the ground herb up and then hold the bowl upright until I'm ready to place it into the vape to maintain the bowl pack. When ready I need to be hitting the whip/direct draw while I invert the bowl to place it into the vape (again to maintain the bowl pack). I don't need to do any of that when using it inverted and the bowl right side up. @PNWMMJ the top hat screen gets stuck if I try to use em with any of my 3 wpas too. My plan when I first got the EV-2 was to use it upright with my VB ht but that very quickly changed to inverted on a normal water pipe and no top hat screen. I have switched out the screens in all of my EV-2 bowls from the el bowl screen to a normal .583" like screen. They sit perfectly where a dbv screen sits in the joint. The EV-2 bowls don't have as pronounced of a lip there but it's there. When I tested the el bowl screens vs. The tradition pipe screen I found that the el bowl screen lets a lot more material through into my mouth and I'm pretty sure the pipe screens are slightly more efficient around the edges of the bowl ... more drag around the edges from the screen being folded in the air path behind the bowl with the el bowl screens?