Q2CSA11 Aileron Counterweight Arm.
This is the Q2CSA11 Aileron Counterweight arm mentioned in the Q2 and Q-200 plans. This is designed to hang inside the fuselage and balance the ailerons to provide better roll control.
Richard Kaczmarek from FLAPS (Fast Little AirPlanes) uses industry standard NDT (Non-Destructive Testing) to ensure no defects in all the metal parts they supply. They are built to the precise dimensions shown on the Metal Parts Drawings for sale here on the QBA website.
Lead time is approximately 10 days.