The Simple Cart Mod noted above looks as though it will work as well as the other modifications you will come across. I've tried all of the others, and none of them worked well for me - in fact, if you PM me with your address, I'll send you some blue foam mods already cut and ready to use - no charge. In the long run, you should consider buying an "auto or bottom feed" mod like the REO, REO Mini, Phidias, Ali'i, or Journeyman, and eliminate your carts all together. They are all handcrafted and a little expensive, but the are well built, and work wonderfully. They each contain a dispenser bottle, either 3ml or 6ml in size, will accept most atomizers, and eliminate the need for a cart. They also use larger batteries, and once I fill the bottle & install a charged battery, I set for 1 or 2 days of vaping without any hassles of the sort you are experiencing. They also eliminate the need to carry extra bottles of juice with you, and the paper towels required to clean up after filling the cart.