Ballpoint for one finger

It's my design because that one finger pen out there https://www.thingiverse.com/thing:2863653 is useless in my opinion, bulky, not fitting properly, for fat fingers. My design is for 67mm pen cartridges, because I had one spare. Anyway the concept of one finger pen is bad in general, but I wanted to try it, you need to use other two fingers anyway, otherwise your hand writing will look bad. But here it is. Print vertically with supports but not in the cartridge hole, you have to block it in slicer if you can. Anyway it was so tight fit that I've cut the cartridge part. Depending on the printer you can print it slightly bigger like 5% or so. Printed on A1 mini, any layer settings should work. Share , do whatever you like with it.