After your yoyo is dry - pry up one edge and pull the cardboard circle out gently. Your circle should maintain it’s shape but you need to gently pull the thread to pull it back into a circle. I like to put my thumb against(NOT ON) the thread to keep the circle in shape as I pull. Pull gently on which ever side you need to to draw it back into a good circle shape. Now you can trim the thread off.
Pull the cardboard out gently
[ATTACH=CONFIG]111693[/ATTACH]
A flat yoyo or a prepared applique circle whichever you want to call it
[ATTACH=CONFIG]111694[/ATTACH]
Pull the thread gently til the circle is back in shape
[ATTACH=CONFIG]111776[/ATTACH]
Now you can trim the thread
[ATTACH=CONFIG]111777[/ATTACH]