Starfire,
Have followed your builds and look forward to this one. You do nice work and progress faster than most. There are some of us who have whittled actions from bar stock. A recent one is a Ballard on the ASSRA forum. Harry Eales (I will pull his chain again) developed a method of putting square pegs in round holes that works very well. Basically, using the mill as a vertical shaper. You can square up the corners faster than you can set up a shaper.
Chuck