Allan,
I will be in Appleton in early June for an education steering committee meeting but I bet there won't be as much time for hands on. Sorry I'll miss you this time around.
If you get a chance, here is your homework assignment for your friends here @ the forum.
Have them do a demo with one of the new Dynasty 350 Hybred power supplies, and ask specifically for them to demonstrate real time differences between AC welding of aluminum using the following:
1. Sine Wave
2. Soft Squarewave
3. True Square Wave
4. Triangular Wave.
I am particularly interested in this new "Trianglular Wave," Miller claims it is better for thin aluminum. This is a new thing that nobody offers to my knowledge. (put some pop cans in your briefcase)
For under 7 grand this thing offers way more than Aerowave did at 11 grand.
Here is the product literature to prepare you for your assignment :)
http://millerwelds.com/pdf/spec_sheets/AD5-0.pdfEnjoy.