Having problems drilling a precise hole in a tube? Ishmael Fuentes has the perfect-and inexpensive-solution with this nifty, easy-to-make V-block drill jig.
Most of the hard work is done, and its time for dope. First, pick the right spray outfit, next find a clean, well-ventilated work area and finish your surface preparation, and then you're ready to spray. By Ron Alexander.
Drill holes without a template using a transfer, get around an airport with a foldable mobility scooter, auto-darkening smart welding helmets are introduced, and relays can save your avionics.