I believe Schraut5 is a member of this forum. He is an inventive designer and scratch builder. One thing in his nicely done video presentation bothers me. The method of clamping the coax cable with locking pliers to prevent the center conductor from slipping is risky. Avoid this at all cost. Don't ever smash, kink or make sharp bends in your coax cable as this distorts the shape of the dialectric causing the distance between the center and shield conductors to change. This alters the impedance which creates standing waves (increases SWR). This is especially true at these ultra high frequencies we use. If your cable is kinked or smashed or damaged in any way, throw it away or cut past the damaged area and use only the good portion.