A practice aid device includes a control body； a control unit； a plurality of finger control assemblies, each including a rotary assembly with a rotatable spool and a rotary actuator, a control cable, a finger strap, a lateral sensor, a finger cap with a tip tension sensor； front and rear straps for connecting the control body to a forearm of a user； and a touch screen, in order to enable the user to control outward and inward rotation of each rotary actuator and measure control cable extension, finger separation distance, and pulling force.
