I once owned an Aero (and a V-Rex) and the Bacchetta (or RANS) seat struts are not exactly the most elegant design. Then again, crap happens and as others have mentioned, re-emailing or calling the toll free number should yield a solution. In the meantime, cutting the pin, as suggested, and inserting a bolt works fine. many people replace the grenade pins with bolts anyway after they find their optimum position.
__________________
Keep the chain tight!