Since mobile phone holders are in short supply for the new amature board, I have designed a holder for the ventilation grilles above the switch lever and printed 3D. The block is only plugged onto the fan blades and stops without shaking. When operating the hand bale you can support it very comfortably on the switch lever. The insert for the phone is for an iPhone X/XS with leather case. But it is only glued to the ventilation grill fixture, you could also use another phone holder. If interest exists I upload the STL files in thiniverse.com.