A few of the more successful home made bits. My first grip was made with some 1/16" aluminum, bent at a right angle with a few holes and a bit of cord tied on the grip. This worked well but I noticed the paint began to chip off the edges as it wasn't sturdy enough to hold the camera's weight and would flex. My second addon was a simple 3d printed picatinny rail that bolted to the two 4mm holes on top of the camera. A case of "it looks stupid but it works." It's good for following fast moving objects such as birds, as being able to track without the delay to the screen or a restricted field of view makes things much more easy. Simply set your focus, with as small an aperture as light allows for a wider field of focus, and put the dot on the thing you want to follow. Lastly an upgraded grip made from 1/4" aluminum bar and a bit of 9mm rod. much more sturdy, and included a cutout to access the backfocus screw.