I do this too, but I do also have a team of scouts (one for each section of Europe, two for South America, and one for each of the other continents). I sent them to 'ongoing' so they never stop searching and set the age to under 18 (or 19 if they're searching an area where kids can't sign for international clubs until they're over 18). Then I just sign the best they come back with for each position in my system every year or two.