Here's what I tried.
with about 35 drops of juice in cart...
Using original filler, floods the atty, doesnt wick right, filler is dented quite a bit therefore not making good contact with the bridge, juice just runs right out of the filler. Weird.
Used a thicker piece of fluval, filled the cart, wont wick right, burning taste. When left on side, juice runs right out.
I tried cutting a long strip of blue foam (about 1/2" wide) and rolling it up and putting it in the top of the cart (after discarding the original filler. This did not work as it didnt wick and it of course is pushed back by the bridge.
Cut that blue foam length in half, rolled it up, put it back in, still didnt wick and was again pushed back by the bridge.
Put the original filler back in, trimmed off the top (the thickness of the blue foam) and made a blue foam cap. THIS seems to be working the best so far. No leaking. But it doesnt exactly wick right either.
I'm afraid to stand it on end as I dont want it to flood down into the atty, but otherwise how would you get the juice to move that way?
The one and biggest thing that bothers me the most about the mega LR atty and mega cartridges is the frikken gurgling!! This gurgling will just not go away no matter what angle I am vaping it at. I am now thinking it has more to do with the design of the whistle tip than anything else. What I notice is that the cart does not fit tightly into the atty and the gurgling is a result of the condensation that is created, and the loose fit and also the mega holes on the sides of the cart for vapor transfer.
It is completely possible that I am doing something wrong here as I am a newbie, but I have read nearly every thread about the megas and the gurgling is mentioned quite a bit.
I think that I will just stick with the 510 atty's and carts on my mega batt. This works great actually aside from the frequent topping off or changing carts.
I ordered some 510 LR attys. I'm now thinking that I should have ordered 510 mega attys and carts and this would be my sweet spot.
I just dont have the time or desire to be constantly fiddling with these megas and all the mods that seem to be required to get them to function correctly. Not to mention all of the juice that seems to be stuck in the megas that is rendered useless. On my 510's my filler is practically dry when refilling.