This phaser was designed for the crew of the USS Kelvin in the 2009 Trek film. This model is ready to print at 100% size, as it is already to size. You can either glue the top phaser pod in place, or use 4 round magnets at 12mm diameter by 2mm thick to attach it to the body.
The 3 Photos of the finished piece were taken by tomcatone, who purchased the files right here!