agree but zebra 401 here
Pilot V5 RT refills fit into the Everyman Grafton pen ($35)
I used that for a while but found the pen a bit too large.
Nowadays I either use an Energel [2] or the classic Pilot V5.
[1]: https://everyman.co/collections/frontpage/products/grafton-p... [2]: https://www.amazon.com/gp/product/B0776M8VY1