Dan and @almikel
I got that external drive caddy and found the files - should be easy enough to run again. Need to know size of panels and also some specifics about what info is needed to operate the plasma cutter. At the moment it can spit out a list of hole centres. The other area of tweaking is in the hole diameter vs hole spacing (effectively the ratio of reflective surface vs open).
I'd love to hear more about the First Watt amps you're building too - I'm hoping to fire up a few electronics projects that have been on the back burner - hopefully have some actual pro