I needed a 300mm disc cutter that is electric and I can connect it to my dust extractor for inside work. I came across the r300dct, which seemed perfect. How wrong was I, I contacted it to my dust extractor and started working. With in seconds dust everywhere. I contacted your customer services, explaining about what happened, only to be told to take it back where I purchased it from, and they can deal with it. I got my money back. As the dust port on the machine doesn't work, to me it's a problem evolution should have delt with. I sent another email to customer services explaining again but in more detail. 3 working days later no reply. It's sold with a dust extractor port which clearly doesn't work.. I have now gone back to a well known brand I have used for a long time that I know is fit for purpose.