Mix It Up. Using a drill for heavy mixing is hard on the tool and on your wrists. A dedicated mixer makes the job easier. Freud's Diablo mixers have variable-speed settings, large steering-wheel-style grips, and useful electronic motor controls like slow-start, an overload shutoff circuit, and constant speed control. The seven-amp DM800E and 13-amp DM1602E cost $249 and $349 respectively. Diablo, 800/334-4107. www.diablotools.com