Sony A7 grip extention

The body of my Sony Alpha 7 camera was a little hard to hold. Made a few trys to design this grip extention. Now it lies good in hand even with big lenses.
Will need a washer M6 DIN 125, a 4 mm steel rod with 127mm length and a UNC-Screw for mounting it to you camera. It is necessary to unscrew it to change the battery. On the bottom right on the camera is a 2mm hole. You can use a pice of 1,75mm filament as pin for orientation.
The frustum of a pyramid fits into my tripod

Later on I design