While trouble shooting the no kickdown symptoms, I found that the intermediate adustment bolt on the driver front of my c-4 doesn't have a four sided bolt head, like the low reverse adjustment bolt. It looks as if someone has ground the bolt head off. Its possible that it could have been snaped off too. Is there a replacement screw? It also looks like someone used a lenth of allthread. Does anyone know where I can get the correct adjustment screw?