I am always the skeptic, but after attaching Tenacious Tape and body pins using E6000 glue onto several of my bodies and racing them last night, I am convinced!
I removed the one-piece brass and stainless steel pin tubes from my Champion Turbo-Flex chassis (the chassis we run out here) and soldered in four short 1" pieces of brass tubing.
I was scared that the bodies would come loose using the straight pins and that they would not survive a crash or deslotting, but to my surprise, everything worked perfect.
I am convinced that the handling capabilities of my cars improved immensely using John's method.
Thanks for the tip, John.