First of all, it only fits the Sport models, not the Liliput. I didn’t realize this initially, thinking the piston rod would somehow remain flush with the end of the converter when filled. That’s not how this converter works. You attach it to the nib unit, dip the nib into the bottle, pull the piston back to fill, and leave it in that position. That added length doesn’t fit inside of the Liliput, as I found out the hard way when screwing the barrel back together. #InkyFingers
Once I realized the mistake I made, I grabbed an AL Sport and started over. The second issue, which you will see in the video below, is that it is a two handed operation to fill. That’s not abnormal, but due to the small size I had to stick my left thumb and index finger practically inside the top of the ink bottle to pull back the piston properly. There isn’t a lot of room to work with. And this bottle is 90% full. I imagine you will have an even harder time with ink bottles under 50% full.