Simple and inexpensive electrical compensation for off-axis and off-center loading sensitivity is possible in compression column load cells having a pair of compensation strain gages in series with each of the main strain gages in the load cell. In a preferred embodiment, the disposable splint is secured to the wearer’s limb via an elastic wrap. The closing device is rested on the resting portion adapted to drop into the aperture. The pressure vessel of the invention, while requiring rotation around its axis of rotation, also requires the pressure vessel to be movable in the vertical plane. The alignment device is releasably secured to the golf grip and includes a feedback element.