Your worried about a max out TDT count?
That has been a thing of the past ever since the map restoration program was brought out to the public.
It is not recommended to ever do a master reset.
Why?
It changes things on the 4d that not even the map restoration program can bring back for you.
While the map restoration program can do wonders, the way these receivers were designed, no one thing can do it all.
The emm provider number is in 3 different places and the MM program can only change 2 of them, the third and one important EMM number can only be done by either subbing or calling in to have changed, but I heard that they are no longer doing that so only a sub will change it now.
Without that 3rd EMM number you will not lock onto the DC2 signals properly.
However, since your sending it to ATS as I said before, box it up as is, and let ATS handle it for you.
If you tell them exactly what you have and the maxed out TDT count they will fix everything up for you properly. The key thing is to let them know before-hand so they can do it.
They use the map restoration program to do this just as I do. However they have the Motorola contacts in San Diego that also will put in the proper EMM you can not if it is missing but why go through all of that when it is not necessary.