Hi, I am building a Series 5 and I have a question. With the 7 the pitot tube system is different, looking at the builders manual. I have the original fitting made of black plastic. I notice on the new models they use metal fittings. I plan to use the original fitting but, I keep seeing something I wonder if is necessary. It looks like folks are making aluminum tubing to fit in the metal fitting and then splicing the plastic hose to the aluminum tube with tygon or something similar. With the original series 5 builder's manual, there is no reference to doing anything like that. I did a test fit of just putting the tubing in the fitting and routing it with a smooth contour and using zips to hold in place:
Pitot Tube.jpg Is there a compelling reason not to route the tubing this way?