Attention! The camera mount is designed for a 19mm wide camera. Not suitable for 25mm wide format cameras. Overall, this is the smartest frame I've ever built. Very strong, with reinforcement for the front and rear edges of the base plate. Support. The top plate is completely smooth thanks to countersunk holes and pan head screws. I see mounting holes for 20x20 and 30x30 stacks. The maximum stack height is around 25mm, which is quite a lot for a three-layer stack. The top plate is 17 cm long, so there is room for a 2200 mAh battery.