McGowan's contouring page lists dimensions for a Sendero barrel.
http://www.mcgowenbarrel.com/contouring.htmI second the Mcrees barrel nut wrench.
Northlander's recoil lug looks like a piece of art.
I'm happy with the standard trigger but I don't care for a trigger pull under 3 1/4 pounds. But I think I'm in the minority there. The accu-trigger is well thought of.
Debating between a .260 and .308 for my next Savage build. I like the ballistics of the .260 but cheap brass isn't out there and I already have plenty of good .308 brass.