To reply to
"As for 9.3x57 & szihn's comments...would you think about doing the same modifications to a pre-WW1 DWM Mauser?"

The answer is YES \If the rifle was in such poor condition that it had lost 90-95 percent of any collectors value before I ever got hold of it.
the Mosin in my post was in very poor condition. If it had been a US Westinghouse or a SIG, I would still have done the same work to it because I made a nice usable rifle that may last a another 100 years from one that was on its way to the trash bin.
I wish I had before an after pics, but I think even the most die-hard collector would agree I did it good if they could have seen what I started with.