I have never replaced the cloth on my 1.6QR's, but there is an article about it on the Magnepan Users Group website.
http://www.integracoustics.com/MUG/MUG/tweaks/green_lantern/repair.htm
Hope this helps. :o)
http://www.integracoustics.com/MUG/MUG/tweaks/green_lantern/repair.htm
Hope this helps. :o)