Miter Gear Box Continued

I took apart the gear box and decided to drill and tap the miter gears themselves for 1/4-20 setscrews. This way I can make sure they stay exactly where I want them once I have the backlash adjusted.
 

I'm putting a small dimple in the shaft here so the setscrew will have a place to rest. I figured out where the dimple should be and made the depth about .100" with a 1/4" drill. This method will work good because it gives the setscrew someplace to bite into instead of just the outer surface of the shaft.
 

Now it's time to put some grooves in both shafts for some retainer clips. These clips will hold the shaft in place so it doesn't move side to side. The groove width is .053" and the clip measures at .050" so this gives me a few thousands of clearance. However my groove tool width is only .047" but all you do is move over .006" and plunge the tool to depth a second time. That's the easy part, the tricky part is getting the groove in the right location from the end of the part.  
 

Here you can see the groove just a few thousandths from the bearing which is just what I wanted. Once the retainer clip is in the groove, the shaft won't be able to move.
 

This is the other shaft in the miter gear box. I cut two grooves here, one on each side of the bearings. I also made an aluminum spacer that will go between the gear and bearing. This spacer won't allow the gear to move, which is overkill because I have a setscrew to hold it in place. Just insurance here.
 

Here is the gearbox assembled again and the arrow is where the aluminum spacer is at. With this being the first time building something with miter gears, I'm extremely happy with the results as they turn very easy and should last a long time.