Boston crushed struggling Swindon to coast into the FA cup second round.
Julian Joachim gave Boston an early lead, before the visitors had keeper Tom Heaton sent off, though Matt Bulman saved Jason Lee's resulting penalty.
On 23 minutes Joachim hooked in to make it 2-0, with Brad Maylett drilling in a third to further extend Boston's lead.
Jason Lee headed Boston's fourth at the end of the first half, before Swindon pulled a goal back on 82 minutes when Rory Fallon scored with a penalty.
Boston Utd: Abbey, Greaves, White, Futcher, McCann, Maylett, Rusk, Talbot (Noble 21), Holland, Joachim (Thomas 90), Lee (Dudfield 86).
Subs Not Used: Ellender, Wright.
Goals: Joachim 10, 23, Maylett 40, Lee 45.
Swindon: Heaton, Jenkins, O'Hanlon, Ifil, Gurney (Shakes 45), Smith, McDermott (Bulman 19), Pook (Comyn-Platt 71), Nicholas, Fallon, Roberts.
Subs Not Used: Whalley, Holgate.
Sent Off: Heaton (18).
Goals: Fallon 83 pen.
Ref: B Curson (Leicestershire).