Canada may not have made the Under - 20 World Championship since 2009 .
Johnston picks out Sears - Duru and the young Australian - raised lock Evan Olmstead as youngsters to watch this time .
Canada may not have made the Under - 20 World Championship since 2009 but Johnston picks out Sears - Duru and the young Australian - raised lock Evan Olmstead as youngsters to watch this time .