Ok
Take this as you want as this came to me, and woke me up from my sleep,,,,,,,,,,,,,,
Take the reel apart again. Take pics and lay all the parts out on the table like in the schematics pic.
My thinking here is this,,,,,,,,,,,
Many parts are no longer available , so they say,,,,,,,,,,,,,,
Go through all parts putting it back together, STEP BY STEP and take pics or even a video .,,,,,,,,,,,,I have a thinking, someone or some reel guy, replaced a part with that spring.
If you say the spring was part of the mix, well, I am thinking a sub part was put in .
Do the total break down and rebuild. I want to know what you come up with AK.