This super-light frame is a beast for 4 inch quads. Built specifically for 4 inch setups while still retaining a X motor layout pattern, this frame leaves little room for tolerances. Because of the tiny 2mm spacing between 4 inch props on all sides - even overlapping the flight controller stack by just a little bit, you must keep the FC stack compact, mounting all FPV gear to either the bottom of the craft or right in front of the FC stack.
2mm and 3mm size holes for 1306, 1806, and 2204 class motors.