Martian rover alternative parts

Hello there. I created alternative parts with threads for the rover. They work fine as long as you glue the thread or block it after placement. It helped me alight everything but the drawback is that, if not blocked in place the parts ten to unscrew during usage of the rover.
Test at your own risk.

Note:
To build the rover you still need to get the original file set from repbaza. I do not own this design.