Tony Stiles suggested I contact you with a question.
I am soon to begin a build of a Barnett J4B2 - plans are for the tandem but I would prefer modding to the coupe. Tony complains about yaw stability;ity issues in the coupe design and I suggested that perhaps some form of 'winglet' vertical stabs might be help in this regards. He mentioned something 'like' the A&S 18A and suggested I contact you.
Do you have anything to offer in this respect? I would greatly appreciate your opinion.