What the thread found

• The DBII requires closing the lever first, then tightening an accompanying screw as a separate step
• A 5/32 allen key is needed to tighten the screw on the DBII
• The DBIII model differs by not requiring tools for operation
• The screw-based design on the DBII was intentionally implemented as a safety feature

Depends on

• The original poster had limited experience with the equipment
• No detailed explanation was provided for why the two-step procedure is necessary
• The comparison to Betztools top stage is mentioned but not elaborated

Parts

Top Stage

Same gear or parts

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