Lessons learned from milling aluminum

• No manual steps for the g-code generation.  The workflow that I came up with for the top brackets is:
  •   Draw in Inkscape
  •   Export to SVG
  •   SVG into makercad
  •   Manually adjust the vertical position for the SVG
  •   Add profile operations
  •   Export g-code
  The problem is that the manual positioning made the process impossible to reproduce.  In my case, I wanted to change the feed rates in the middle of the first run, but have it mill the same workpiece. 
• If the piece around the spindle's collet starts to shake, stop things before it falls off.
• The settings from Inventables for milling aluminum work.
• Mill in the center if you want to avoid getting aluminum dust on the y-axis rails and carriage.