Step 7. is to apply pressure to the front 'corners' of the cape - I press them into the stand to make the cape smooth and straight. The cape then stays in place as it has gripped onto the stand.
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Here you can see one side is done and the other is not.
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Then repeat for the other side.
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It takes a lot of time to get it right. Chances are you will ave to keep futzing and altering small bits of it every time you walk past it and notice something out of place. I have found that simply leaving it and letting gravity pull it down also helps. Hope that was useful for everyone.