Described examples include a device having a body. The device also has a first flexure on a first surface of the body, the first flexure having a first modulus of elasticity. The device has a second flexure on a second surface of the body, the second surface of the body opposite to the first surface of the body, and the second flexure having a second modulus of elasticity. The device also has a fixed member on a surface of the second flexure opposite to the first flexure. The device also has an adjustment device on a surface of the first flexure opposite to the second flexure.