RAM Mount Universal X-Grip II Tablet Cradle w/ 1" Ball & tether and it can also help

and it can also help reduce some of the motion-induced "jello effect"--wobbly

Extremely robust and lightweight

Quick release bases make attaching and removing the camera easy

so the empty space can be filled with foam or the protective plastic cap from your Ribcage kit

an easy one-handed Flex Grip Video Arm that moves every way your want it

RAM Mount Universal X-Grip II Tablet Cradle w/ 1" Ball & tether and it can also helpThe RAM HOL UN8BU consists of a spring loaded cradle and 1" rubber ball connected to the back of the base. Included are extra easy access grip knobs, located on the back of the cradle for quick release of your tablet. The RAM HOL UN8B expands and contracts for perfect fit of most 7" 8" tablets. The X Grip includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that will fit the dimensions listed