Finished all CAM programming for the 00003-002. Will cut at a time when I am allowed to make some noise.
Working CAM paths for the 00003-002. After an hour of trial and failure regarding the "External" slot (on the right side of the image), I discovered that you can do a normal pocket operation by clicking the bottom face of that feature, and then going to "Extensions" and ticking "Enable Extensions" and "Extend Corners". I think the problem stemmed from the fact that the ledge was narrower than the bit diameter, but this cheat code seems to work. 
Machined the rest of the 00003-001 on the 00001 CNC prototype. Learned a lot about offsets and the controller. Some lessons learned about the FreeCAD CAM toolbox include oversizing the stock, even in XY if that does not represent the actual material, as this will allow you to be slightly off in zeroing the part, which will save time, since the edge finder takes forever to use. To remove collets from the spindle, after unscrewing, you can choke the collet with one of the wrenches and jam the other one in the gap between it and the spindle and twist, and any stuck collet will pop right off.
Used the CNC as a manual mill by jogging directly and inputting specific MDI Gcode commands to face certain areas and trim the long direction to size. Also use a tiny center drill on the CNC to precisely position all the holes, though I did drill manually on the drill press and tap by hand.
All in all, took a few hours to make this part, but a lot of that was the learning curve. The other parts are basically copies with some minor simplifications, so I will be sure to time how long those take to produce. 
Got some experience with everything from coordinate systems to speeds/feeds, to the Mach3 controller. Faced the top and bottom surfaces to 20mm thickness within .2mm for the 00003-001. Tiny oopsie on the corner (bottom right of second picture), though that should not detract from the function. See video. All good fun. 
Learning more about the CAM workbench. 
Working on the cnc toolpaths. 
Modeled the 3 distinct parts of the low-profile vise. It's based on this product on Amazon. It has a bolt pattern than more closely matches the T-slot spacing on the 00001 CNC prototype, is sized for standard (cheaper) imperial material stock thicknesses, has more horizontal threaded holes for clamp-up, thru threaded holes for the side clamp pieces, and lower-profile clamp pieces that should provide adequate clearance for the entire y-axis of the 00001 CNC prototype to move without crashing into the vise. The 00003-003 large lower slotted piece can also potentially be made thinner to reduce cost and improve clearance. The 1x -001 and 2x-002 pieces will be machined on the 00001 CNC from aluminum to replace the stock ones on the product purchased from Amazon as a first preliminary test of cutting aluminum. Added the assembly to the repository. 
