Charlie Lamb's method is almost identical to the way I was taught by Stinson Hill, Howard's uncle. I was losing points at the Howard Hill World Championship in Wilsonville, AL around 20 years ago and Stinson helped me out. He was cooking burgers, and put my points on the grill to heat them up. When they were hot, he gave me a cup of water to quench them in after they were glued on and pressed hard. Haven't had a problem since. I now use a torch to heat the clean tips to the point that the little bit of glue bubbles some, but doesn't burn when the point is rotated on under pressure. As soon as it sets enough to release the pressure, it goes in a cool cup of water. This seems to create a vacuum when the point contracts that keeps the point in place.
Ferr-L-Tite will work fine if everything else is right. One thing to consider if you still lose points is whether the taper is accurately cut and the proper length. If the angle is off or if the taper is a hair too long and bottoms out, the points won't stay on regardless.