Primer lines need to be silver soldered into their fittings. Using RTV to fix a leak is not acceptable and poses a serious fire hazard.
![[Credit: Wikimedia Commons]](https://www.kitplanes.com/wp-content/uploads/2026/07/4_rutan_a_longez.jpg_preview.jpg?w=218&h=150&crop=1 "Rutan Symposium Turns to the Coming Canard Maintenance Crisis")
![The week ahead: a KC-135 tanker passes over the grounds at EAA AirVenture Oshkosh, where Phillips 66 will set up at tents #430 and #431. [Credit: USDA Forest Service]](https://www.kitplanes.com/wp-content/uploads/2026/07/Screenshot-2026-07-22-at-10.01.04-AM.jpg?w=218&h=150&crop=1 "Phillips 66 Sets Course for Oshkosh With Specials, Seminars—and Popsicles")
![[Credit: Lisa Turner]](https://www.kitplanes.com/wp-content/uploads/2026/02/Fuel-Selector.jpg?w=218&h=150&crop=1 "Fuel Follies")
In Case You Missed It
RANS S-7S Courier
Marc Cook pilots the new RANS S-7S and finds many improvements, from increased fuel and storage capacity to a simplified aileron-control system that makes handling better than ever.
What’s New
This months column includes information on new anti-collision strobe lights and LED position lights, a micro belt sander, a smart servo controller for trim, a desktop model of the Cozy Mark IV and the announcement of a taildragger configuration option for the Eurofox SLSA.