Endoscope. Piston, valves, torque box, frame

[Leo B]

Hi,
I bought last week Endoscope. Here you see some photos: Piston, valves, torque box and frame. Pistons and valves shows how rich the mixture has been. Torque box has surface rust. Frame rear has also surface rust. I will clean Torque Box and rear area of the Frame inside with phosphoric acid. Then paint both outside. Spray corrosion protection treatment inside torque box and frame. Spray transparet protection on the frame after the paint.
Torque Boxes are very clean outside and also the Frame.
Endoscope is very handy. Prices are not huge: from $ 40 - 120. Depends the quality you need. I have wifi version and I use IPhone.