Parker 65 cap clutch too tight - FYI

[alexwi]

I have a Parker 65 whose cap was extremely tight to put on and remove, and looking inside, I couldn't see the traditional metal clutch prongs, so with the help of a Dycem sheet, I took it apart only to find a rather interesting clutch mechanism:

 

 

The inner cap has slits towards the opening and there's a spring wound around that "waist," creating the pressure needed to secure the section when the pen is capped.

 

To adjust, I simply took the spring off, wound it around the barrel of another pen and stretched it with a letter opener:

 

 

I ended up overdoing it a bit, but it's still usable:

 

 

Sharing in case someone else runs into the same problem.

 

Alex