It's all done online in one day if you can get a good FSDO inspector who knows what he's doing on the phone, or weeks after an online complaint filed in Washington if he thinks he knows and is an azz. I went through that yet again at the North Dallas FSDO some months ago. Coincidentally I actually got a call from the FSDO manager yesterday because he wants to make sure the clueless inspector gets retrained. That is a positive sign of progress there, he said he needed to remind the inspector that the FAA is here to serve the pilots. WOW, I loved that !!
When I brought my plane from another state I had to let the new FSDO know it was here and I got a great inspector who knew what he was doing. We got it done quickly and he sent me a new A/W and ops limits for my plane. A couple months later when I got my new N number assigned and needed to update the A/W again, I got a clueless inspector and it was horrible.
I hope you get someone knowledgeable so your experience is quick and pleasant.