Help with drippy, early Balance?

[azkid]

I have an early Lifetime Balance that is far more prone to dripping than virtually all my other pens.

With Quink Black, the slightest jostle deposits a large drop of ink on the page. With Pelikan Black it isn't as bad but still drips with slight bumps.

The only other pens I've encountered that are this drippy are Parker 21s (not supers).

Pretty sure my 1925 Parker Duofold, Lucky Curve, and Wahl Ringtop aren't this prone to dripping.

Is this behavior typical of the early Balance pens? Or might it be leaking air somehow? It doesn't seem to write excessively wet.

The pen is untrustworthy for work use but I like the pen. If this behavior is "normal" can anything be done to improve matters? An ink less prone to drips? Retrofitting a later (or different) feed? Modifying the feed?

The pen has what I presume is an early feed that is thin with a flat bottom.

My later Balances use a different style with a sort of rounded bottom.



Thanks in advance.