ORIGINAL: grbaker
Sometimes just sealing the hinge gaps can fix flutter problems.
Agree!!!
Sealing the hinge gap often helps. Also making sure you are using 4-40 rods and not 2-56. Counter balancing. There shouldn't be any slop or bend in your controls. I couldn't see how you had the controls set up in your photos but the spades looked cool! I have never tried them before.