Just purchased a new dryer and trying to upgrade my venting system. I have rigid 4" pipe on about a 20 ft run from laundry room to outside. My problem is getting from the back of my dryer to the straight run. Here are some pictures. Feel free to jump in. I HATE flex ducting. Opinions? I can't cut any farther to the right as the current cut is right up against the floor joist. I can cut more to the left. You can see my 4" rigid pipe is pretty tight as it is. The vent in the dryer will not line up with the current hole as it is more to the right and I can't cut the floor joist.