Remember the day of grinding weights? Grinding engagement notches, remove weight from the tip etc. What a pain plus a lot of trial and error and a big tool box of what did or didn't work. I currently use SLP Magnum Force and they do now have a new series that ranges from 69.2 to 77 grams. Much easier now just changing set screws. Even use aluminum and tungsten (thanks Turbojamie for the tungsten idea) to move weight around within the weight.