About three years ago when Delnor was a High School student we had a unique way of making curved stair units. See the set here: http://homepage.mac.com/szpisjak/V-Show2001/PhotoAlbum23.html Well the way we cut the stairs by putting a fancy plunger router on a long swing arm that was measured and simply built for task. The stairs would have two vertices, one for the far side curve and the second for the near side curve. We would then stack all the pre-cut sheets of plywood and then secure them together with drywall screws. Making sure none of the screws would fall on a cut line. We would then make a few cuts on the top of the layer, move the arm to the second vertex and do the other cut. WE would then remove the screws and then work our way down the stack. Well for whatever reasons a kid named Ryan did not put any 1x4 or 2x4 runners under the stack. So Delnor accidentally routered into the three-year-old fir stage floor. It was kind of scary at first. There we were covered in beige sawdust, with beige saw dust all over the place and then this streak of reddish fir saw dust. At first I thought he got gashed. But thankfully, well from our perspective, he was not. Our resident TD/SD/LD may have felt different. We were able to woody puddy the long gashed and then repaint the floor. We had to screw some plywood covers over the gash to protect the puddy from foot traffic. You really can not see the difference anymore. The floor paint covers a lot of sins!