If piece has a "blind side" that won't be seen, then THREE screws through the template. I always use three, because if one failed there would still be two holding assembly. Double stick tape is a PITA for me. If I were making several multiples, I would add some vacuum tape and a fitting to template. Place on stock, turn on vacuum and route away. Joewoodworker.com has best price on vacuum tape that I know of.