Is there a "default" slope for the playfield as considered by the game designers? If so, how do you determine it?

I ask because I've noticed that the game play can change quite noticably with the pitch of the playfield -- not just speed of play, but what shots are possible, etc. It occurs to me that the game designers had planned out a series of possible shots and their relative difficulty to make the game challenging yet enjoyable. This suggests there would be a game default setting.

Any thoughts? Simple as just making all the leg adjusters the same height?

Is that 6 degrees measured on the glass?

Is there a measurement on the glass you can use? Or does the angle of the glass to the playfield vary significantly from game to game?

Glass is obviously much easier and more convenient to measure from.

No problem! BTW, I like the push along type train sets. Very efficient on the electrical energy usage. They roll nicely down a 6 degree slope, too.