Genius Hunt; Looking for simple: tensor, micro, gyro method of sending back data from depth of 1,500 feet to surface. My original plan was for piezo connected wires that stressed out potential differences for signal processing - but I require elegance for a brutal limestone rock underground, any ideas? Now, I am considering nano variance on this valuable concept. ( Nano-Gyro, but Surely there is an off shelf method that wouldn't bust my bank account. Thanks, don hall / drhall@iglou.com