I came across this when I was doing a USB pass through mod.
The issue is that every time I try to refill, I can only get about 3-4 drops in the cart before it fills to the top. I know the 901 carts with the sponge material can take at least 7 drops. I made a small modification by cutting about 1.5mm off from the bottom of the sponge material, then insert a shrink tube (any straw like material with an hollow center will do). The shrink tube's inside diameter is about the same as a toothpick. With this mod I was able to fill about 7-12 drops before it was full. I am also able to vape longer without refills.
The Idea:
The Steps:
Cut a length of the straw to the size of the cart chamber minus 1.5mm.
We also need to cut a angled slit to expose the cross section of the straw on the bottom.
Here is what it looks like in a cart with the sponge material.
Been vaping for about a week and it works perfectly!
The issue is that every time I try to refill, I can only get about 3-4 drops in the cart before it fills to the top. I know the 901 carts with the sponge material can take at least 7 drops. I made a small modification by cutting about 1.5mm off from the bottom of the sponge material, then insert a shrink tube (any straw like material with an hollow center will do). The shrink tube's inside diameter is about the same as a toothpick. With this mod I was able to fill about 7-12 drops before it was full. I am also able to vape longer without refills.
The Idea:

The Steps:
Cut a length of the straw to the size of the cart chamber minus 1.5mm.

We also need to cut a angled slit to expose the cross section of the straw on the bottom.

Here is what it looks like in a cart with the sponge material.

Been vaping for about a week and it works perfectly!
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