Against Halifax it was West's strike minutes from time that earned Slough a replay. And on Tuesday night at Boreham Wood West, a half-time replacement for Danny Bailey, struck with three minutes to go to send the game into extra time.
And thanks to that strike Gary Abbott was able to put Slough ahead in the first period of extra time for a lead that would see them through.
Manager Brian McDermott made a few changes from the side that drew 1-1 with Boreham Wood on Saturday. With Garry Smart still suspended, Mark Fiore stepped in at right back while Corey Browne was chosen to partner Lloyd Owusu up front.
But Slough were soon under pressure as the first half saw waves of attacks from Boreham Wood. Their first meaningful attack came from Shaun Marshall who hooked in a shot from Hollingdale's cross. Danny Bolt put in Slough's best early effort with a piledriver from 20 yards but it was struck straight at keeper Martin Taylor.
The home side's front man Tony Samuels was a constant threat and Paul Wilkerson pulled off a fine save to deny the striker. Then Samuels appeared to foul marker Terry Angus which allowed him a dangerous run towards goal but was thwarted again by Wilkerson.
Disaster struck in the 34th minute when Paul Hardyman was adjudged to have pulled down Samuels in the box. Terry Robbins stepped up to fire home and put Boreham Wood in the driving seat.
Slough then had to withstand a barrage of pressure and were lucky not to go further behind in the final ten minutes of the half. Samuels again was in the thick of it and he forced another fine save from Wilkerson, and minutes later drove another effort just past the post.
Then from a corner, former Chelsea star Kerry Dixon headed down dangerously towards goal but it bounced up and over the bar. A few words at half time, no doubt, and Slough Town came out with all guns blazing. An early effort from Gary Brazil was fired close over the bar and Mark West hit one just wide.
Slough kept pushing forward and with just three minutes to full time remaining, Slough brought relief to their fans with the equaliser. Following a corner on the left, there was mayhem in the box, and Mark West somehow managed to get a shot in and drove the ball into the net to take the game into extra time.
Abbott's strike on 102 minutes brought the crucial breakthrough, as he headed in Matthew Stowell's cross from the right.It could have been 3 just before the break but Steve Daly managed to head Browne's dangerous cross behind.
From there the Slough players put in a very professional performance, playing keep-ball to minimise the home side's threat.
There was one late scare when Dave Hatchett headed over from yards out, but in the end Slough deserved their win.
Boreham Wood Line up
1. Martin Taylor, 2. Steve Daly, 3. Alan McCarthy, 4. Terry Robbins, 5. Garry Nisbet, 6. Rob Hollingdale, 7. Dominic Grime, 8. Shaun Marshall, 9. Steve Heffer, 10. Tony Samuels, 11. Kerry Dixon. Subs: 12. Dave Hatchett (for Robbins, et ht), 14. Steve Talboys (for Samuels, 64), 15. Paul Shaw (for Dixon, ft).