Ok….didn’t have a lot of time last night but enough to remove the cover, dismantle the mechanism and flip the ‘centering’ spring. Note the third spring has not been disturbed at all.
Also checked that the dots on the gears lined up correctly.
Honestly, I don’t see any difference in the spring one way round from the other. It’s possible that there are some minor differences in the angle of the legs but hard to detect…..makes me wonder if the spring was ‘handed' as such how you would know the correct way if it was a new spring fresh out of the package?
I took photos below.
I didn’t have time to refit the case and try the gears, hopefully will do so tonight….fingers crossed.
Thanks
1-original spring.pdf