Quoted from mahony:I'm guessing the hole under the start button is for a tournament button? If this is the case any suggestions on an actual button? I would want a round one to match the start button. I looked around and could only find square shaped ones.
You have a couple of different tourney button options. There is the official Stern offering. As you said, it is square and even more off putting is how bulky it is and the way it protrudes out from the cabinet. It's obvious that it was not made for the current cabinets and I'm still hoping they will redesign them to look right on the current cabinet type.
The other option is an aftermarket button sold by someone here on pinside. It is round and looks much more fitting with the current cabinet type. The issue with it is...it doesn't fit and requires that you bore out the tourney button hole in your cabinet to make it fit. It seems a bit pricey too....but what really put me off was the idea of having to bore out the tournet button hole and therefore taking away any chance of going back to the plug or even one of the other aftermarket things you can normally install in that tourney button hole.
So I'm waiting for a more (visually) fitting Stern button or more (physically) fitting aftermarket button.