Gayle - YOu may know these already - this is the list of resources
that i use for my PUK.
There is a PUK fb page - PUK Welding Revolution that is the user
group you are looking for.
In addition, Lampert has 26 or so online seminars.
Further, Rio Grande Albuquerque has a class at least once a year on
the machines and their techs can answer questions.
Robert Sepiashvili is the US rep and get you pointed to answers at
[robert at lampertusa.com]
Jeffrey Herman at http://www.ganoksin.com/gnkurl/ep824b
has a very
complete set of discussions on the PUK.