Just a heads up, apparently Alliant has a maximum number of external accounts one can have.
Didn't know that, but apparently one can reach the maxiumum amount of External Accounts that Alliant allows. When I tried to add one more it wouldn't let me, and gave an error message saying I'd reached the limit, and that I'd have to delete one in order to add another. So I deleted some and it let me add a new one.
It looks like 24-25 range is the max.