This was an instant (impulse) purchase. 🖋️
@chrisfoley they aren't listed as compatible, but I've used Uni-ball UMR-1, Zebra JF, and Muji Smooth Gel refills in my other Tactile Turn pen without any problems.
The Muji 0.3mm refills are my current favorite.
@wldunbar I’m a big fan of Muji refills in .5, especially in blue black or orange. I also enjoy using Kaweco refills, both in rollerball and ballpoint.