Has any body ever use this? It is only 7mm thick.
http://www.amazon.com/Flipbac-FBG4-Camera-Digital-Cameras/dp/B006TOHWN4/ref=sr_1_7?ie=UTF8&qid=1403999375&sr=8-7&keywords=eos+m+grip
http://www.amazon.com/Flipbac-FBG4-Camera-Digital-Cameras/dp/B006TOHWN4/ref=sr_1_7?ie=UTF8&qid=1403999375&sr=8-7&keywords=eos+m+grip