These DIY links will pair nicely with the SHAPEWAYS scx24 rod ends by rexracer19 if you're trying to give your scx24 just the right amount of custom stretch for your application.

Premade links at 60mm, 55mm, 50mm, 45mm and 40mm (4 of each in kit).

You can trim these links to your desired spec or run them as is because they're hollow all the way through.

Make sure you have at least 8mm-10mm of 5-64 or 2mm all thread in the links.