The burn mark was a great idea of mine to put esc inside with a wrong propeller/ battery type = nearly burn everthing ... strange because i knew it but still done it ?
The black box at the front is my alcatel mifi modem 4 g lte from orange ... could not configure my stick 4g ...pretty bad but with the mifi works great !!
The gps is from drotek.com a great French start up who makes electronics in Toulouse ( next to airbus) quality is amazing ( no cheap chinese pcb) with a great price. This gps is xl version of M8N at eur 30 who can pick up 17 sats.. there are smaller ones too