I got these pump carts last week, and I used the 3.0 ohm bridgeless on my P-Vari and I removed the filler like I saw in the video. Since the bridge was not touching the hole, I learned (from the video) that it will not leak and you only need to touch the button for a split second when the filler is not in (from the video) so I filled one up with crap liquid that i didn't care about, and tested it on a bad atty (debridged) , so i could watch the Niquid level go lower and lower. what I learned is that that 1 quick tap, only works when the liquid level is above the button, but once the liquid goes below the button, no matter how many times i hit it, the liquid is not moving ??? Then i'll tap a couple times while holding the button, and the entire thing spills out onto the atty and through the connection. I thought at first it was me, but it's been a few of these now, and all are doing the same thing.
Should i go back to putting the filler in, and pumping 10 times to get a drop? because I'd rather do that, than lose 1ml of liquid every time i try to test it out without the filler in.
I'm thinking it's user error, but I'm literally just tapping on it, and the liquid drops half way from a split second button press, then once it's below the button, it doesnt move ? Am I making sense ?
Also, if you use the filler option, and always keep it in, do you have to pump the cart 10-20 times no matter where the liquid level is ? because I did that while holding it outside of the atty and nothing really came out, and i pumped it a good 50 times... Do i need to do the dry hit and button press technique ? I'd rather do that, than lose 1.5ml in a matter of seconds all over my desk.