Testing pens before shipping

[Hamster]

I recently sold a fountain pen which the customer reports delivers too much ink, see attached customer photos. I suspected air was getting into the ink delivery system and suggested the customer checked that the nib was screwed in tightly and that the ink cartridge was pushed fully home which they were. I wanted to keep the customer happy so sent out a new nib to replace the one they have. Hopefully this will fix things, but it got me thinking...should I consider testing my pens before shipping? Is this something others do? I'd welcome any advice, thank you!

 

[d_bondi]

Cartridge or converter, if converter, I wonder if it is overfilled. After filling, expel 3 drops of ink and the draw back plunger.

 

[Woodchipper]

I write with all pens for in tense QC. Only made one FP which has never sold.
Furnish a small pad for customers. Wife got a laugh: This pen writes.

 

[duncsuss]

I always test fountain pens before shipping, and include the page I've written with the pen as "proof it is working". (This is after I've smoothed the nib using Richard Binder's guide.)

I write with Waterman's Serenity Blue in the converter I'm shipping with the pen, on Tomoe River paper. It is the nearest thing to a defined standard that you'll find. Then rinse out the converter and flush the nib unit using an "ear syringe" (rubber bulb with a nozzle), using distilled water for the final rinse.