About this 3D model

So I wanted to calibrate my printer just for retraction to avoid stringing.So I made this thing.And now you can have it. https://cad.onshape.com/documents/74a808dcade297d28dc03499/w/23909d55c9ac0b7a4f368ccd/e/8c000bc06676e0f1cef7a91e 2 MMF mods: I am perfectly fine if someone rehosts this thing or it's remix as long as it honors the terms of GNU GPL v3 license.