I unrolled the aluminum tubing and cut to length I then shrunk the 4’ heat shrink tubing onto the oil lines overlapping 2 “ I then applied a second layer for added protection from rubbing in the side ducts were they will go from the engine to the front end. As I do things on the plane I try to keep the weight down but find myself adding more protection then needed. I will make up for it when it comes to the seats.