Arduino robot base replacment

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/cFV7Ss17eQO

This is a replacement to my Arduino robot broken base. first attempt.
http://svc.dxcdn.com/upload/reviewpicture/201412/be03b8db-4ba9-4b17-9968-1b680ad01203.jpg