Here's a tip to find the right line to get Ace most of the time on hole 4 at Royal St George.
But its with a ghost putter, so don't know what other accuracy wil be like with different putters.
Get the aim arc to 30 feet. Then go across to the edge of the blue grid, you'll see lines how the green is cut, and try and stay in the line which is shaded, like shown bellow.
With my ghost putter i have 100 foot increment that go up in 12 feet stages. I go up untill i reach the 72 increment, then once i'm at 72, i lessen the power a tiny bit so its more like 68/69.
Usually, i'll press a tiny bit early than the ding line, but it doesn't make much difference as i've had a ace with ding, and also when i press a bit too early.
This usually gets an ace, or very close, depending on power/hitting ding or what ever. The line is very close so experiment a bit, or go a touch more left if you end up left of hole. I've had 3 aces now, and i've only played it a few times.