What the thread found

• An arm post mounted upside down can snap under load, potentially causing injury or equipment damage.
• Arm posts have two different ends: one end has a hole located at or very near the tip, while the other end has a hole positioned approximately 15/16 inch or 0.225 inch from the tip, and only the correct end should be inserted into the gimbal handle.
• The end with the hole closest to the tip is the correct end to insert into the gimbal handle and where the post clamp mounts.
• Heavy-duty arm posts are available without holes drilled into them as an alternative design.
• Arm posts should have clear orientation markings, as many operators have used them incorrectly without realizing the problem due to insufficient warning labels.
• Eye-bolts on arm posts may fail under the stress of back-mounted vest configurations.

Depends on

• The specific measurements and hole positions apply to PRO brand gimbal arm posts.
• No resolution was reached regarding whether manufacturers should add additional safety warnings or markings to posts.
• The claim about eye-bolt failure on back-mounted vests is mentioned but not elaborated with specific failure data.

Parts

Low Mode, Arm Post

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