Paul from SWISCO responded:
May 19, 2016
The pivot shoe resembles our 15-111. I also recommend two S160-7 coil springs for each side. I'm not sure how they lock the two springs together in your window, but with ours, you will lock one spring in the 15-111 shoe and lock the second spring into the hole of the first spring; think of it like a piggyback. Then you place the nylon cover over the springs and screw to the window frame.
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