Well... some more progress on the duplicator. All done now exept for the linkage between the two sets of clamps.
Off work at the moment (flu) so once it warms up (winter here, Dunedin, New Zealand, frosty start but sunny day) I'm going out to my shed to have a look at the cocking piece mounted sights on my fathers rifle.

I'm also looking at using one of those Parker Hale fold down aperture sights for my 7x57R.
I'll look more seriously once it's actually put together.