Micro TIG welders

[Blender]

As a side note:
carbon steel welds turn out great and are super easy. 18ga at 75 Watt-seconds is pretty strong and looks nice. A little bit more penetration would be nice.
Brass is very sooty/ugly which might be due to the chemistry. Best suited as a fixture before torch brazing.
6061 aluminum welds are too shallow or they blow through. Tried blunting the electrode which helped a little. Need to experiment with some filler.