I will be more than happy to send you a free vertical fin and rudder for free....just call Tamjet at 408-2247600 between 8 am to 5 pm PST and we will take care of you.

It is possible that the cause is still unknown or it is a quality control problem at the factory. Tam will be personaly inspecting the factory, when they build the next batch of Vipers, for quality and consistency in the weeks to come.