The next goal was crucial and SMSC made it two through Marc Parry (a collectors item) in the second half. Soon after it was three, with Levy scoring from the spot.
SMSC took their foot off the pedal at the end and will be disappointed to have allowed Miam back into it with two late goals but they will be delighted to have made it into another semi-final and continue with their treble charge.
South boss Jody Marks told JC Sport: "With so many changes, I am delighted with the way we applied ourselves. Having three 16-year-old boys making their debuts was special and the treble is still on.
"Now we look forward to playing our friends Oakwood next week and hopefully our injury list will improve come Sunday."