How many times after attaching the pitot tube to the nose of an aircraft have you accidently snapped it off while applying decals or the landing gear? After having this happen to me on numerous occasions I finally came up with the following solution.
Take a small square or oblong piece of paper (I tend to use bond paper for its added strength) and roll it up to form a cone which will fit over the nose of the plane and be a 1/4" or 1/2" longer than the pitot tube. Apply tape to the cone so it will retain the shape. If necessary, cut the cone to fit the nose and attach to the plane with low tack tape. I also use these pitot tube protectors when transporting models to contests. This certainly prevents all those expletives after breaking off a pitot tube, losing it on the floor, and having to attempt to make a replacement from spru.
Dick McC