I put on Air Dog but was looking for some way to redo the line coming from back of head ,mine has hole and wanting to go with steel braid or same kinda hose like the air dog uses

 

The return lines are low pressure so you can either cut out the damaged section and replace it with rubber hose and hose clamps or you can redo the whole thing with new hose and JIC fittings. The only problem is that the VP's overflow valve is a banjo to hard line that cant be changed and there's a T-fitting that connects the VP return with the head return which also needs to stay. So those two things will make it difficult to redo the entire return line system with anything but OEM stuff.