Oh man I’m glad I found this thread. I moved my pins around and now I have my old Travel Time flanked by two newer Stern pins and the playfield deck looks flat as a pancake next to the others. I thought something was terribly wrong. I guess not.

Well, I tried screwing the back levelers all the way up, and the front ones all the way down. Still too shallow. Didn't seem to play right.

I saw a trick mentioned in another thread to take the front levelers off, remove the nut and screw the leveler back in without the bottom nut. That may have gotten me a few extra tenths of a degree, but still come up short. So, I decided to try taking the front leg levelers completely off. I ended up at 5.5 degrees, and IMO, the game now plays perfect. BTW, there were no lateral leveling issues with this as it turned out. Even if there was, it would have been pretty easy to shim either leg.

The bottom line seems to be that there is no right or wrong. Just adjust the machine to how you want it to play. I just did a flipper and pop bumper rebuild, so the game was playing way too fast and strong for the weak 3-3.5 degrees it was at.