My neighbor is an avionics tech, and he said PET hollow tube is the best, lightest conduit. Getting up into the nose cavity forward of the spar is hard, so I ran the nav light conduit just aft of the fuel tank bay. It's about 4 feet of extra wire, but a much more reliable place to work. I ran the pitot hose up in front of the spar and it was indeed quite hard to work up there. I only had to go through about 8 ribs though. Im waiting for a friend who might have a pitot tube from a 182. Hopefully its12 volt, which will allow use of the pitot heater. Not sure if a 24 volt heater can be configured to run on a 12 volt system.