at my home hardware store they have little collars, designed to slide over the pipe... they work perfectly, no cutting required, and are what I used.
See the duct tape in the picture? That was so that I could adjust how far out the collars sat. It worked great, you can see a little bit of dust where the collar joins the pipe elbow, but VERY little, almost none, on the ground.

(that potato looking thing is a rock... just sitting on the ground)
See the duct tape in the picture? That was so that I could adjust how far out the collars sat. It worked great, you can see a little bit of dust where the collar joins the pipe elbow, but VERY little, almost none, on the ground.
(that potato looking thing is a rock... just sitting on the ground)
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