back skin of KOA2 is aluminum, it is solid but slip, sometimes I want to hold the left side of KOA during reading(I am not a lefty), but its too slip to hold( of course it can be rotated 180° , waste energy and the right side is also a little bit slip)
I found a suction cup in IKEA, clean up KOA2 back skin and put a tiny of water, then it works