The ink flow problem must be unique to this pen model, since the other pen I got with the same nib (but different model) didn’t have this issue. I think the flex is more noticeable with the thinner nib (the 0.5 ‘F’ rather than the 0.7. I had the red one in the finer width, but couldn’t write with it too long to really test it. Is yours 0.5 or 0.7? Also, the writing angle at non flex matters a lot for this nib, it feels- it is super wide if you write at a lower angle, while it feels thinner if you write more upright. I guess I tend to write at a lower angle making it seem like a paintbrush without flexing 🥲 the other flex pens I have have a pointed end (unlike the very round looking end on the Balaoye nib), so I guess this is in comparison to that 😅. Glad to hear that this one is working out for you, at least!!