thanks 4all the tips hope to get a drum soon i got lots of feelers out but, its a no show so far. has anybody made a lower vent system going to all 4 vents by way of a single upright ball valve. if i were to do this would i need to increase or decrease the pipe size further away from the ball valve. im thinking of taking a lg fitting from the top lid (replaced with a Weber lid for added space) and welding it along the bottom of drum opposite the main intake and piping the other vents into one vertical valve with 2 90* elbows on top past the valve to keep out rain water. im thinking the further away from the valve the pipe would get progressively bigger as it works back toward the welded fitting so the air flow would be more or less equal. or does it need to go from bigger to smaller ??? am i thinking to much into this, rather than KISS (keep it simple stupid).