I am having to replace the Velcro Pad on my 26 inch Woodmaster Drum Sander. Does anyone know the correct angle to cut the end of the Velcro Pad. I tried coping the angle on the sand paper but I guess with the Velcro being only 4 inches wide and the sandpaper being 6 inch wide it changes the angle. I am a little afraid just to do trial and error and run out of Velcro pad. Any help or guidance would be appreciated. Thanks in advance.