"Wimberley Sidekick Safety Plate for RRS Lever Clamps $30 shipped"
What is it? If you are connecting your Sidekick to an RRS lever clamp, you need this plate: "The Wimberley AK-100 Sidekick Adapter makes it possible for the Sidekick to be attached to a Really Right Stuff (RRS) head with the lever-style quick release mechanism. The adapter is necessary for these heads since the lever-style system is of a slightly different size than the standard Arca Swiss-type fitting used for the Sidekick mount. Traditional twist-knob clamps will work with the AK-100 as well.
The plate also features a stop-screw, which assures that the Sidekick will not slip out of the quick release clamp by mistake."
It's $42.95 new. This is in perfect LNIB condition. Free shipping in CONUS. Paypal required.