Please, don't bang your head too hard against the wall! Seriously, I thank you for acknowledging and sharing your oversight. Many times on these threads through the course of troubleshooting-analysis the solution is staring you right in the face and we're right here with you!
I won't ever claim to know everything but the miracle of this hobby (and electronics) is that you never stop learning and there's some fun and accomplishment-satisfaction along the way. Plus, if you haven't done something in a while these threads do a good service to rekindle those forgotten processes too.
