PenBBS Fountain Pens and Cartridges. Which will they take?

I'm a bottle ink guy and rarely use cartridges, but I'm interested to find out what cartridges a PenBBS fountain pen will accept. I had assumed they were compatible with standard international short but I was wrong. I do an experiment to see if Parker Quink Ink cartridges will fit. Long story short, the fit in the section, but the long ones do not fit in the barrel of the pen. The Parker short cartridges should work.
Music:
Concerto No. 3 in F major, Op. 8, RV 293, "L'autumno" (Autumn) by Antonio Vivaldi, in HD quality!
- Classical music piece performed by: John Harrison — Violin / Robert Turizziani — Conductor / Wichita State University Chamber Players


- Music licensed by: John Harrison


- Music license: CC BY-SA 1.0

take?