Ok, all seems good now, I hadn't made any mistakes on the pcb stuffing. I did find I had a different receiver with digital audio in and it seems to work just fine with both this and the simple gamesx mod. So the KLH was the issue after all and the much older Sony shines... I should have...

Well I ordered a set of pcbs and 3 sets of components, hooked one all up and I got nothing... I'm a disappointed with documentation here as well. For instance i'm not sure how exactly d+ and d- are supposed to be used. I'm going to coax if that helps. Also very disappointed with the pcb...