Adding the S60-X to the list of supported keyboards.

TMK-Based-Projects.md

@@ -3,7 +3,7 @@ Add your project here!
 See https://github.com/tmk/tmk_keyboard/issues/173
 
 ### keyboard
-
+**S60-X**: [DIY 60% keyboard](https://www.massdrop.com/buy/sentraq-60-diy-keyboard-kit?mode=guest_open) designed by [VinnyCordeiro](https://github.com/VinnyCordeiro) for Sentraq.
 
 
 ### converter