Just realized... stupid me ! ..... There is NO WAY one could fit a fan in a 2215 if like mine (and most units AIUI), it has the modified SMPS which replaced the TRIAC based regulator with the PWM / FET daughter board ! The board is mounted upside down and some of its components lie where the fan would go, most notably the big 400V mains filter cap, to start with !
Oh well....
Vincent Trouilliez