Thanks for those kind words guys, it's good to be back

Some update photos...

Receiver will be bead blasted along with the pop-up peep sight parts, so not rubbed back.
The bolt took a LOT of work to get sorted 'someone' had filed off the top surface unevenly to clear a scope, and there was significant galling under the extractor collar

Safety lever still to be done...

A few small rust pits still to remove from the trigger guard, but otherwise looking good:

The image below shows the difference between the M98 extractor and one from a CZ550 that I bought as a spare part to replace the incorrect M98 one fitted. Note the CZ550 extractor is ~5mm longer and is almost exactly the same as a ZKK600 one... good to know if you need a replacement, don't know about the shorter ZKK601, maybe a M98 Kurtz?

Matching 320 abrasive paper on the Tally QD rings