Began fitting the Dynon pitot to the SafeAir mast. I wrapped a piece of electrical tape around the base of the pitot to make a very tight fit in the mast. There is a small boss (actually 4 of them) inside the pitot base. I marked the location and transferred the marks to the mast. Then I drilled four small pilot holes thru the mast and pitot base using a #51 drill.—1 hr.