What the thread found

• The two thumb screws on the socket block control in-and-out balance between the sled and your body, while the two knurled screws control left-right balance.
• To zero out side-to-side adjustments, turn the bottom knurled screw all the way in until threads disappear, then out one quarter turn to prevent binding; turn the top knurled screw all the way in, then out two and a half thumb-turns as a starting point.
• Proper operating position involves standing with good posture and turning your pelvis at a 45-degree angle toward the sled while keeping it close to your body without contacting your knee or face.
• The vest should fit snugly on your shoulders with even velcro tension on both sides, positioned straight, and the waist portion centered vertically on your pelvic bones.
• To test balance, stand in proper position with good posture and gently open your hands to see which direction the sled moves without being touched.
• If the sled falls away from your body, adjust the top thumb screw inward and bottom thumb screw outward; if it falls toward your body, reverse this adjustment.
• For left-right balance, turning the top knurled screw to make threads disappear pulls the sled left, while making threads appear pulls it right.
• The bottom knurled screw should remain as tight as possible for connection strength and only the top screw should be adjusted for side-to-side balance.
• Thumb screws and knurled screws require only finger-tight tension, not heavy wrenching.

Depends on

• The user was testing with a DSLR and 17-40mm lens, likely below minimum weight specifications for the arm.
• Instructions assume left-side sled operation; adjustments would be mirrored for right-side operation.
• Socket block configuration may vary between models, particularly regarding knurled versus T-handle wrench adjustments.

Parts

Arm Post

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