REFLECTOR: Oil lines and ground wire.

[Scott Derrick]

My plane came with high pressure hoses for oil lines. Both ran in the 
pilot side duct.  I noticed that the manual calls for 1/2 " aluminum 
lines.   I was considering replacing the high pressure rubber/steel flex 
lines with aluminum.  Much lighter and smaller, those hydraulic lines 
are huge and heavy.

I was also considering running one up the pilot side and the other down 
the copilot side to take advantage of the additional cooling benefits.  
Has anybody done the comparison of running both in one duct and one in 
each to see if there really is an advantage?

Then I got to thinking about using the oil lines for my ground return 
path from the battery to the engine?  Aluminum is a pretty good 
conductor, and having two lines would seem to provide a substantial 
return path if I bonded both tubes at both ends? 

Anybody do this?

Scott