Hey Diesel,
How many dowels did you use? Were they used on the sides only? How deep into the panel did you go with the dowels? How much did the carbon balsa panel cost? Did you use epoxy to adhere the triangle stock to the back side of the carbon balsa panel? How has it held up? You fitted the carbon balsa panel between the side braces like the original firewall? Did you use epoxy throughout when installing the panel and dowels? Or did you use fiberglass? Pro Bond Polyurethane?
As you can see, this is going to be a new undertaking for me. I hope reading this didn't make you dizzy!
Bozwth