Here is a video on a cyclone dust collector/separator that I built in 20 minutes using a 5 gallon bucket with a lid and some spare wetdry vac parts and hose that I had laying around my garage. I attach this to my wetdry vac and then attach it to my tools for dust collection. It is a very simple design and it only took my 20 minutes to build and it is very effective collecting almost all the dust in the bucket letting very little make it into my wetdry vac. I had all the parts laying around my garage but if you were to go out and buy the parts to make it then it should be under $20, you can see the parts needed in the video and easily get an idea how it works, it is very simple. I hope this video helps, I know I saw a lot of videos where people were just making overly complicated dust collectors that didn't work much better than this simple one. Since I only have a small shop and just use my wetdry vac for my dust collection I quickly noticed how bad all the dust and shavings were for my vac and came up with this simple system which has been saving my wetdry vac from excessive motor wear and tear and from the filter getting destroyed. If your just using a wetdry vac for your dust collection in your shop then I would definitely make one of these collector/separators, it is very quick and easy to make and it is cheap to make, as I said in my case I just had the parts to make this laying around my garage and even if you have to buy the parts your still only going to pay a fraction of what something like a dust deputy would cost you. I forgot to mention in the video that I ran some self tapping screws thru the side of the bucket into the side extension piece in addition to the hot glue to help hold it in place.