Hand tools and fabrication machines
It's always easier to show something than to describe, so I'll go quick - have fun!
If you're not in Turtle Community - the.stl models for the rotator will link you here: http://www.turtlerover.com/models-subscribe
If you're the Community insider - just access our Turtle Google Drive repository - everything sits there. (If you forgot how, just write to us :)
Use hammer (or it's substitute) to put ball bearing into the Base. Make sure that bearing seats properly. You can use something flat to make sure that bearing is not skewed.
Plug the cable and M2 nuts in their places. (hint: you can use cyanoacrylate glue to keep them on places - but be carefull not to spill it on threads)
Place Dynamixel on its place and screw it in using M2x8 bolts.
Place the platform on its place. Make sure it is fitted properly and then bolt it with another M2x8.
And that's it! Mount anything you want on it and have fun with your Heavy duty Dynamixel platform.
Check out what Turtle Rover can do! - www.turtlerover.com