Take a look at the attachment and tell me what's wrong with this picture. I've worked on Synchro-Compur and similar shutters before, but this one's of more recent vintage. It was about a stop slow on all speeds, so I flushed it out with naphtha, and now it's running much better, but the B & T settings aren't working. I've obviously got a pin that's not engaged or maybe a spring that's come loose, but I can't figure out where it is. Any suggestions?