Tom from SWISCO responded:
June 2, 2017
You may be able to just remove the top cap of the sash that's covering the interior tilt latch. It runs along the whole top length of the sash. That may let you remove the wool pile. Otherwise, an easier solution than taking the frame apart would be to cut the old wool pile and pull it out in strips, then gently easing the new one in with a flat putty knife.
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