The model looks good. Your definitely on the right track.
When you get to the point where you want to start adding some complicated geometry, the most useful tool in the world is the ability to add work planes at any location or angle relative to your part.
Kinda like Mr. Miyagi's wax-on/wax-off. It seems like such a simple tool of little useful value, but its the foundation that allows the lightbulb to come on later for thousands of ideas.
Here's a video on creating planes that I made for new Alibre users. The plane creation tools in Fusion are close, if not identical to Alibre.
I recommend that newer 3d modelers go through the plane creation tools and practice them. Every single one, one by one, over and over until they are second nature.
In that R8 collet rack I used several non-standard planes. For the flat area with "R8 Collets" engraved, I created a plane set at and angle to the top, rearmost edge of the part. Then offset that plane so that it intersects the part, then created a rectangular sketch and extrude cut, to create the flat. Then added the text and extrude cut, to engrave.