 Next, we're going to go back and add a slider joint to the rack here. So assemble as build joint, I'm going to select my two components, my rack, and then choose the base. Then I'm going to go to motion, change it to slider, give it the edge you want it to slide about. So I'm going to click right on that edge, right on that point, and now I've got that motion. There we have it. We have the rotational and the translational here, the slider. Perfect. The other thing we can see here is we are defying some laws of physics. So let's go ahead and fix it. And to do that, we're going to go back to assemble and we're going to select motion link. The important thing to remember with motion link is you set it between joints and not between components. You have to go to your browser here and tell it which joints do you want to set the relationship with. So here we want a relationship between the revolute and the slider. Usually you see something like this. It's just kind of spinning like crazy.