Sauchie were first to threaten in the opening minute with a corner that was headed narrowly over the bar by Morrison.
The visitors then went ahead in the 11th minute when Comrie set up Morrison who outpaced the Penicuik defence to score.
In reply, Penicuik attacked up the right wing and Darrell Young crossed the ball into the six-yard box from where Somerville’s first-time volley crashed back off the far post and was cleared. Penicuik were piling on the pressure and should have scored but Lough’s shot went inches past the post.
Despite the home pressure, Sauchie doubled their lead in the 33rd minute when Tully headed home from a corner kick.
Penicuik, however, battled back into the game in the 39th minute when Ryan McCallum volleyed home a Lough cross at the front post.
Sauchie should have scored just before half-time when a great run and cut back by Millar was struck inches wide of the target, but at the break they still led by 2-1 !
Whatever manager Craig Meikle said in the dressing room at half-time, it most definitely did the trick because Penicuik upped the pace of their game and put Sauchie on the back foot.
In the 48th minute, goalkeeper Harkness pulled off an instinctive one-handed save to deny McCallum and then was relieved to see a powerful strike by Ryan Gay whistle inches over the bar.
In the 63rd minute, a quick break by Sauchie put Morrison one-on-one with ’keeper Coyle, but his shot came back off the base of the post. Meanwhile, at the other end, Aaron Somerville’s shot hit the side netting.
In the 67th minute, an altercation between David White and Duffin led to White being booked and Duffin sent off following his second yellow card.
Four minutes later, the score was level when Tapping, under pressure from Somerville and Lough, had the misfortune to turn a dangerous Ryan Gay cross into his own net to make it 2-2.
In the 81st minute, a Devlin chip over the Sauchie defence appeared to be going out for a goal kick, but Somerville had other ideas and knocked the ball to the front post where Ryan McCallum pounced to slip the ball under ’keeper Harkness for a superb Penicuik winner, completing an excellent Cuikie comeback.