Shaving the AP Diaphragm Rivet (Option 1)

Remove 2.5mm...

We want to take about 2.5mm off of that, or about 1/8". RedBeard450 has expressed that measuring exactly how much you shave off is Not Necessary, so go ahead and shave it down a fair amount. If you happen not to take enough off the rivet, it will cause binding with the AP Link Lever and AP Set Screw when wiring them together, so make sure you shave it down a fair amount. For shaving the Rivet various tools can be used, for instance sand paper, Dremel tool, grinding blade, or sander. For shortening my rivet, I used a metal cutting blade on my Skill Saw and gently shaved the rivet down.

Shaved rivet...

After you have shaved your rivet down, measure if needed (optional), or if you just shaved it down a good amount, then the hard part is over.

Now that we have our rivet shaved down. We can proceed to putting the AP Cover back on.