anyone use an endoscope to keep an eye on they're piston heads? Needs to be under 7.5mm in diameter to fit through pre combustion chamber.
this one looks ok on amazon..
Wireless Endoscope, NIDAGE 5.5mm 2MP WiFi Borescope 1080P HD Semi-Rigid Snake Camera for iPhone Android, Tablet, Motor Engine Sewer Pipe Vehicle Inspection Camera(11.5FT)
