Flyonline....at least you found your problem.  Again, not saying they won't change anything, just that they never changed anything for me.

This really is an amazing community, the internet should learn from you, guys 
Kudos to you, Flyonline
Thanks Terry Green and all the others for the precious advice.
Charlie Lamb, great catch! I hope to have a pic like yours with my ASL one day.

Brush Buttons and the rubber duber silencers made by the same company could change tuning.  Especially if you add nocking points to keep them from sliding around on their own.  I use a bit of alpaca wool, it takes just that little bit of vibration out of a longbow string and is real handy to use as a wind indicator, if you pull a fiber and set it free on the breeze.

I tried brush buttons years ago.....threw them away....too noisy banging into the limbs.

But that was just me...maybe not so noisy for others.

That kind of rubber got hard in the cold.

I live in Ga....don't get cold till December ...loud in September at 95 degrees

I have dang near died from a heat stroke, I have dang near died from freezing to death.  Neither is a good option. Some will enjoy disagreeing with me, but almost any bow will see some kind of improvement with even a small amount of vibration dampening of some kind, whether it be feel or sound. 

No big deal Pavan....i just don't like brush buttons    Found them loud.