Please try to convince any TEITELBAUM researcher (with whom you have been corresponding) to join our project, especially if they have already taken Y-DNA tests with FamilyTree DNA. And if they have not yet done so, then they should also get tested.  There is a program to collect funds to encourage them to do so, if cost is an issue.  The more people who join, the better the chances there are of finding matches and making progress in our research.