What the thread found

• Using a SAM plate instead of a shoulder bridge plate saves significant weight and brings the camera closer to the top stage.
• The EVF (electronic viewfinder) can be omitted when the focus puller operates via WCU-4, Hi-5, or ARRI Companion App for camera control; some operators retain the EVF for quick adjustments and despite the weight penalty.
• Focus motors can be mounted inverted from above, eliminating the need for lower rods; Teradek can be positioned on the 'silent' side of the rig.
• The onboard battery can be replaced with an eliminator plate (4-pin XLR to V-lock/AB connector) or omitted entirely by using ARRI-specific power cable directly from the sled.
• Assistants often build with sliding plates, rods, handles, and onboard batteries; this assembly area offers easy weight savings.

Depends on

• Approach depends on workflow (wireless vs. hardwired focus control and monitoring).
• Elimination of onboard battery requires power distribution from the sled.
• Motor mounting and cable routing depend on rig configuration and camera position.

Parts

Top Stage

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