This is a kite string winder based on the Prism Kites card winder, but with a loop that makes it easier to hold onto. I stayed pretty close to the original dimensions. It holds 200 feet of kite string, maybe a little more. Printed in PETG, it is a little more flexible than the original, which I believe is injection molded nylon.

I printed it with supports, but it only needs very tiny supports around the line keeping hooks.

The model is here in Onshape if you wish to remix it: https://cad.onshape.com/documents/5c071ff45ead0865510301a6/w/a0514a711187c3dd83caec8c/e/2ead35637d4d43fa86607564?renderMode=0&uiState=67745ec3f5386e356dc46c4b