<p>I bought an F3 from eBay for a ridiculously small sum because the seller didn't realise the shutter needed batteries to work except at its single mechanical speed. It's actually fully functional except for the usual missing AE lock button, which is another project. Anyway, as is common with F3s, this one has had a hard life and at some point has had a whack on the prism housing which has dented it severely. The glass prism itself works OK and I have managed to find a replaccement housing in good condition (complete with viewfinder blind lever and eyepiece, which the original is missing), so need to do a swap. I know there are no electronics inside so it should just be a case of unscrewing the housing and removing the prism, but does anyone have any tips?<br> It's an original F3, not an F3HP. Thanks.</p>