A quick update. First, let me thank all of you for responding, for the most part, with positive replies. I in fact did everything that everyone suggested except for Ralph, because I don't want a refund. But I thought that was one of the most generous gestures that you could have made.

Okay back to business. Using WD-40 and lots of firm pressure I pushed the metal caps as far as they would go onto the spark plugs. I then used slightly larger than quarter-inch wide hose clamps and tightened them as firmly as possible using a nut driver. Then I moved the ignition system battery midway between the firewall and the receiver. Turned everything on and fired it up! You guessed it, No RF feedback, receiver was rock solid , and the engine throttle up and down evenly. It was a joy to behold!

Again gentlemen, thank you for your help. It's especially nice to know that there are places like this forum to get help and guidance!!

The Smith Mini will soon be flying!!!