Adding a microphone, light, battery, or SSD can shift a phone rig's center of gravity and make it harder to control. Diagnose the direction of the pull first, then move the support point or offset accessory inward, reroute cables, and retest each shooting orientation separately. Handheld balance does not prove tabletop stability, so use a deliberate surface check before recording. If the rig still demands excessive grip force, wobbles, rotates, or tips, simplify the build or change the support method instead of automatically adding weight.