These are features that I didn't know where even supposed occur in my machines until I saw a youtube video:
Jacks Open: I had this game over 3 years. After you complet the royal flush targets, all the drop targets reset back up. I didn't know that another coil is supposed to kick down the black targets leaving only the red targets standing to shoot at. When i first saw that on youtube, I though I was seeing magic. Problem was a stuck reset arm.
Lady Robin Hood: I had this game over 8 years. I didn't know that the lower bullseye passive bumper when hit, would lite and blink. Also the 4 lights behind the large bullseye image on the BG would flash as well. Looks so much better now. I always thought it would be neat if the bumper would flash. I didn't realize there was even a bulb in there because the cap was glued on tight. Dirty/Miss adjusted switch on the score motor.
Thanks youtube, and people for posting vids of machines... I'm should make and post a video for 3-coins, and 1948 Phoenix.