What's a twin imply?
I'll ask about this. I assume a Gnu Rider is a brand but what are mag and c2btx?
39 really isn't old by any standard...
Twin implies both the front and the rear of the board are mirror images of each other. They are the same. Great for riding switch since they are center stanced (meaning you stand in the middle of the board naturally).
"Gnu" is the brand.
"c2btx" is the board profile. Its a hybrid camber