What exactly is the gray insulating material under the GPS? Yes, I know what it does (EMI shielding), what I'm asking is does anyone know what the material/manufacturer/part number/etc. is? DJI does not seem to sell it as a part. Or do they? I don't see it on any DJI or third party catalog. I'd like to purchase either the DJI part, or the equivalent shielding material. I don't care so much if it has the adhesive like the DJI part, I can find a way to attach it if I can get the equivalent shielding material. Thanks!