"Most of the Dremel kits available on the market at the moment have different features to suit different people. The version I would recommend for modders is one with a variable to speed adjuster as this will allow you to cut anything as plastics need very low speeds and computer cases need very high speeds. There are also some versions with fancy features but these are expensive and are not needed by a case modder. A basic Dremel will set you back about £60. This may seem a bit expensive to some people but I have found that the Dremel comes in extremely useful and have use it for things other than modding (if that is possible)."
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