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You can see how to easy build a simple dust collector in this video. I made a dust collector from two plastic buckets.
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Did you see this ? 3D Printed Cyclone Separator - Building - Testing
You can use it both to drill 90 degree holes and to drill holes in the depth you want. It also works for joining two woods together, you can see in the video.

I make long C clamps using some hard plywood. You can do a lot of compression with these extra powerful clamps. It is very useful thanks to its long arms.