There's a really neat pin position at the back of the 12th green at Machrihanish, in a diagonal trench running from front left to back right. Balls feed nicely down into the trench, but if you miss to the left and slightly long you're left with a massively downhill, left-to-right breaking putt which seems impossible to get close using the "conventional" method (i.e. try and pick a point at the top of the slope well to the left of the hole and have it trickle down to the hole).
I've had this putt a few times, and was delighted to discover one one occasion that it was much easier for me to get the putt close to the hole, and possibly even make it, by ramming my ball well through the break, 10-15 feet up the far wall of the trench, and letting the ball trickle back down the slope. (It's the putting equivalent of what Tiger did at the 16th in the final round of the Masters this year, really.) I've done this in tournament play as well at Machrihanish with great success - the margin for error is much greater - although it's crucial to make sure you *don't* hit the hole on your way past it the first time, as that could cause a lip-out or take away some of the speed you need up the far bank and foil the entire strategy.
And yes, Tom, it was a real thrill the first time I realised that I attempt this putt in this manner and pull it off successfully!
Cheers,
Darren