Hexacopter / Quadrocopter centerplate for alu 10x10mm arms frame1 mount the motorcable and controler under the arms frame2 mount the motorcable inside the arms when you using 8x4,5" prob's, then you need for the outside (cross) arms 200mm and for the middle 160mm alu 10x10mmrebuild my own quadrocoter to a hexacopter