Just got this cute little converter in the mail, and I thought it could be interesting to a lot of folks looking for converters for their smaller pens. This model does fit the liliput, so I think quite a few smaller pens will fit it. It is a push and pull (no twisting), and feels very well made.
The opening was a little too small; I had to stick a toothpick in there and wiggle it a little bit for it to fit. But after the first time you plug it onto a pen for the first time, it's a nice fit.
I carefully measured the ink capacity and it's about .58mL. So yep, not a whole lot... You probably don't want to put this on a double broad Visconti...