<p>Thank you everyone for your suggestions. As you suspected, the mirror is sticking up during dry shooting, was just a coincidence that it didn't. Dry firing repeatedly didn't seem to help. I'll check out the mirror foam angle.</p>
<p>And yes, Mukul Dube, the mirror does go back up when advancing the film and cocking the shutter. What might this indicate?</p>
<p>I enjoy handling the FT, a hefty piece of kit. Also, when those hippy straps were popular, I hated them with a passion. But now that I have one, it seems especially fitting on the FT. </p>
<p>Thanks again!</p>