Yeah John, I used to do that when I first got my Egos. Would actually put them cart down in one of those 16 oz Dixie party cups. Seemed to reduce the flooding somewhat.
I don't need to do that anymore tho. I don't know if its because I switched to blue foam filler but I don't have the flooding problem anymore unless I way overfill the carts.
I find that 90% of time that gurgling sound is not flooding, but the condensation that forms in the cart. I'm having to pull the cart and blow
thru it into a tissue to clear it out and that stops the gurgling for a while.
Now, I either lay them down in a large ashtray or on the table or just stand them on the battery end with no probs.