Firstly thank you to whoever suggested looking at those with largest segments rather than total cm's a few months ago. By sorting by largest segment on gedmatch and FTDNA I found a 2nd cousin twice removed at the top of the list on gedmatch and a fourth cousin at the top of the list on FTDNA. Both had a largest segment of around 40cm but no other segments over 20cm. Until then I had had lots of false positives. This makes me think that it might be an idea if the testing companies and gedmatch sorted by largest segment as the default sort at least for those in an endogamous population (would it do any harm even for those without endogamous DNA?). Does anyone else think this is a good idea to suggest to them?
