Hi Roberto, I figured I would place this here, and not individualy to your single posts - hopefully this will help address your posts. There are a number of posts already about the possibility of finding bricks within known insert ranges.
There are some important things to understand about how the bricks are printed, and how sheets are numbered, and how and when and where inserts are placed in bricks.
When bricks are found, then the associated bricks can be found as well, based on note position numbers within the sheet. So when one brick is found, there is more than just 1000 notes that can be analysed. The details about the how, where, and to a lesser extent when (in general) inserts are found is well-documented throughout this site, resourced by many of the well experienced brick searchers from coast to coast.
So, if you are looking for a single brick of 1000, all inserts, it is not going to happen. The numbers that would be associated to that brick and it's sister bricks would then constitute a range of NON-Inserts.
I would ask that some of some other more experienced brick people comment on this, to confirm, and to add, and to also please correct me if I am wrong or am missing some info. If I am, I would like to learn more too!
Hudson