it's closer but I can see, even without a wireframe, that you are missing support edges around the circle areas and they are not holding their shape. Also, I am guessing you either thickened in the + direction or translated + z. Watch the section of the video where I add the inner support edges and add thickness. I show what happens when I tried to thicken in the + direction and it looks just like your render.

Don't be discouraged, you are very close.

I will be making another video to show you how I would model the remaining parts soon. Here is version 2 of the completed caster that will be in the next video.

I wanted the bearings to be more visible. No sense burning all the polygons for them (even unsmoothed) and barely be able to see them (smile).