Well this would not qualify for our Part 103 (true Ultra Light) category, but aside from the 2 seats, I'm willing...are several models of ATOS wings that are rated for tandem use, so with a very lightly...
Trois minutes dans le dur quotidien d'une station technique Air Creation...
Found this in the wild - steeeeep turns and wing overs in a Tanarg. Also a couple of hands off takeoffs. Really appears to be a well tuned wing...I wouldn't try that in mine!