[How long do you play the same golf ball?]

I play with a golf ball until I lose it. Which varies from 2-3 rounds up to maybe 7-10. Oh and I never bought golf balls in my life, I’ll play with whichever balls I find on the golf courses. Golf is already too expensive as it is.

[Putter shafts - Do they matter?]

I doesn’t matter at all. But since some people think it does, then why not grab their money anyway?

[Lower controlled ball flight]

S300 is just an awful shaft. It’s too heavy overall and too stout in the butt and mid section but with a comparatively softer tip. This results in a awful boardy feeling, it’s really a disaster of a profile. Who does it fit, really? I bet close to no one and yet you find it everywhere.

I would suggest that the OP change to x100 immediately, not because it will positively contribute to his game but because it will make golf much more enjoyable. 

[Is the 60º wedge really that hard?]

This discussion is meaningless because of QC. Odds are your wedge’s loft is within (-3; +3) of its stated loft.

[Horrible fitting experience - need shaft help!!]

Going back to the OP’s concerns about not having tested DG:

- the s300 is an awful feeling shaft

- interestingly, the x100 is nothing alike and it’s probably the best feeling shaft ever.

- both are very stiff, stiffer than Px 5.5 (so I would assume that they’d be far stiffer than Lz 5.5)

- if you really want DG, I would look at r300 hardstepped (which is closer in profile to the x100 than to the s300)

- all imo