When designing the Little Crow Gunworks World's Finest Trimmer 2, the feature most customers asked for was the ability to interchange trim chambers. Instead of press fitting the trim chambers, like the original WFT, the trim chambers on the WFT2 are a slight slip fit in bearing with a groove cut for an O-ring which creates a press fit. Changing out trim chambers is accomplished by removing the cutter and pushing out the trim chamber with the knock-out dowel that is provided. Installing the trim chamber is accomplished by setting the trim chamber on a flat surface and steadily pushing the housing onto the trim chamber. Setting the cutter depth is easily adjusted by placing a "master case" in the trim chamber and sliding the cutter up to the case mouth and tightening down the set screws. Trimming is just as precise and clean as with the original trimmer. The trim chamber selection on the WFT2 is by specific cartridge, but still trims by case family-just order the largest c...