Hi... I might have misstated the problem I am having with severe yawing in the B-58. The aircraft flies perfectly in the manual mode. The severe yawing starts when I am locked to the GS only. Perhaps this might lead to
how to correct the problem. The B-58 came with no radio or ILS capability so I installed a Bendix radio and installed a GS indicator that blinks when I am in range and then goes out when locked to the glide slope and centered and that's when the yaw problem surfaces.
As a final answer, I would have to say your addons (radio etc.) are not compatible with the flight model, only thing to suggest is to find another, which either is compatible, or already incorperates these features