OK, I found the DT info in the FS Table Info.
There's a partial Centaur logo in the upper left corner when converting to DT. I looked in the Backdrop editing screen & could not find anything for this. How can I delete this? I took the Background image from the original DT version & used it in the FS to DT version in order to dress it up a bit. But that Centaur logo lays on top of it.
There seems to be a sound difference between the DT and FS versions. The DT has reverb/echo/stereo sound when the ball hits the pop bumpers at the top of the playfield. It's kind of neat because it's different. Is there a setting to make the FS version have this sound?