I'd been finding it a little too easy to snap off the aerial tubes on impact (especially with shop bought prints). Greg @ ZAxis3D has made a key modification to korylprince's work that provides greater strength and doubles as a print support for the protruding aerial tubes. I'm using these modified versions on both a Vortex and an Emax Nighthawk. The combination of both 36mm mounting holes and zip tie slots make it a very versatile item to fit. UPDATE: This should also fit the X4R and X4R-SB as the dimensions are the same.