Thank you mateI admire the cut of your jib 1260. I'm about to embark on a similar project although I'm still at the CAD stage. ( Cardboard cut outs ) I've got an Anschutz stock, a Walther cylinder, a CZ barrel and a spare Reximex regulator. My breech blocks normally start off as round stock to enable drilling/boring from both ends. Squaring off comes later. It's a bit wasteful of material but it works for me.
The problem I've got is lack of space in which to finagle a trigger mech. I'm working on it. Can't wait to actually start machining.
I always look forward to seeing your work . love your external finishing. holes and patterns.
get your self a big four jaw . stick it on a face plate .
you can machine alsorts of strangeness .
I hate the design stage mono block chassis are a pain with internal and external parts fitted .