Okay I did some on the spot testing today of the Onza and am trying to figure out where the noise is coming from on the bow. The noise happens when I pull the string back just a bit and let it go it makes a thunk sound on release. I took off the SOS and it did not make a difference. I then took off the STS and that did not make a difference. I tried three different stabs and that did not make a bit of difference. I seems to me that the noise is coming from the string itself and not from anything else. I know this is not really the best testing method but the thunk is driving me crazy. I put some cat whiskers on it but I think they are too short to help so I think I will redo those as well. I also made sure that everything was still tight as far as nuts and bolts go.
So does anyone have any ideas on how to quiet a string thunk?