Disclosed is a method for forming a polycrystalline silicon film by crystallizing an amorphous silicon film. The assembly includes an anti-tamper access-blocking element positioned in an anti-tamper position proximal to the fastener, along with an anti-tamper switch operably coupled with the element in order to bias the switch to one switch condition. The acoustic wave device may further include a wall layer and cap that define an enclosed opening around the transducer. The garment also has a front and back crus elastic band members extending obliquely on crus leg members, which cover the crus areas of the wearer. Consisting only of a power-FET and PWM signals from a printer-controller, this system, using a novel PWM frequency-optimization technique, reduces printhead power usage by as much as 13%.