I personally like the airy draw on the protanks, but wife doesn't. Read some fixes including toothpicks, tape, putty, evod heads, even a band-aide! Here's mine, a large o-ring had in the junk box which is on bottom of protank, resting on the small ledge of the mod .... rather nice because you can lift or push down the ring to adjust draw however you want. Scuze the fuzzy cell pic, but you get the idea!
