fuel sending unit and fuel gauge trouble

Ok I got the new printed circuit boards in there....and now it works! It reads at a half when it's full, not sure if it's coincidence or not but the tank is about half the size of stock...

Another odd thing that took me a bit to figure out is that the gray wire for oil pressure sender was removed from the firewall pass through connector.

I'm running a set of after market auxiliary gages, so now I will have the factory gages as a failsafe. What do you guys use for that oil pressure line, they provide a plastic line which I don't like...do they make a better option for that little line?

Also what are you guys using for transmission cooler lines? I want to get away from the rubber hoses.