Checked out my 3 lane outdoor range today. Decided I will build the test tunnel on lane #3. If the weather is right will pour some concrete to extend the area behind the bench. Then enclose the bench area. The tunnel will be 4' X 4' for about 52 yards. Have to build a small house at the target frame to be able to change cards. Will be lighted at the frame.Pictures to show progress as I go.