@m5stack_ag G'day, Thanks for reply. Any chance I could get a few technical tips please... For example; If I were to take the 3D antenna off, which solder points are which? -- to use for, say, a tiny coax to an SMA mounted on PCB. I can't tell from circuit diagram and I don't know if the Stamp is printed to indentify the points under the 3D. A photo with pointers would be useful ;)