Anybody have any bright ideas???

After numerous tweakings, adjustments, and so forth, I am still getting a fairly loud "slap" or "twang" with maybe some buzzing too on my liberty. I thought some of the noise was the rest, but I switched rests and there was no difference. Then I replaced the stock string silencers with cat whiskers... no difference. Then I switched to string leeches - again no difference. I checked every screw on every accessory and on the module/cam, the cable guard screw, and even tried other cable slides. Tried sims cable guard silencers, and even tried shooting with my doinker and stabilizer enhancer on and off. Still no difference - every screw is tight. What the *&%# is the deal here?? I am shooting with a kisser and peep, and both are tight and not flopping/rattling around. What gives?

Ready to go jump in a lake
Bill