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My Fastarc G-1 and Sanwei Target National both form a slight mountain shaped dome on the topsheet side when I take them off the blade. The sponge on the concave side. Does anyone have an idea as to why happens? The fresh sheets before cutting did not have any curve if I remember correctly. Normal water based glue (free chack II) used. Alternatively, a sheet of old Tenergy 05 and unboosted Neo H3 I had taken off in the past were flat as pancakes.
