Now I get it -- the drawings helped a lot.  I was imagining something way more complex. 

oh thats great, it didnt sound like your description fitted the design, so I got inspired to make a diagram
I think it might require a lever to operate it though

Thanks for explaining instead of taking it personally.

Look if a couple of dudes with lots of tats rock up at your house in a grey Chevy, just tell them its been fixed :)