Might be a good idea Swinksy if u did the Sterns by looking at the Playfield art section on Stern USA which has ALL Stern playfields, and you can use the flyers on Sterns website to go playfield by playfield on recent models still in production. You might get a more consistant result that way ?.
Since u have an idea of how u are counting or listing the Stern features.

Maybe other members could put their hand up to do a certain brand, or their machines then send the info to you, and you could then post the data.
Just a suggestion to make it look neater. Its only a thought/suggestion.
Also, sometimes too many features (ramps, locks, pop ups, drops, pops, mechanical toys etc) on a game can ruin it, or slow it right down.
More does not always mean better.

Good thread.