I modeled this in OpenSCAD since none of the putting targets I've found fit the flimsy chains of my Discmania Pro Lite basket.

The included stl file (and the existing values in the OpenSCAD file) works for the chains on a Discmania Pro Lite basket. If you have some other basket, whip out your calipers and measure a chain link and use those measurements to generate a target that fits your chains. There is a scaling factor that you may have to change depending on the precision of your printer.

You can add an optional zip tie slot to make sure the target stays on the chain, this is controlled via the ziptieSlot parameter (true = generate slot, false = don't generate slot) plus the ziptieWidth, ziptieThickness and ziptieScaleUp parameters.

Print with brim.

Edit: 2024-12-20, OpenSCAD file updated, noticed I had missed to parameterize the position of the slot.