An оccupаtiоnаl therаpist is wоrking on prosthetic training with a client who has a right transradial amputation and uses a voluntary opening (VO) body-powered terminal device. The client reports that while they can easily open the hook using body movements the device lacks sufficient grip strength to securely hold heavier household items without them slipping. Which adjustment or strategy is most appropriate for the OT to implement first?