I finally got one up and running... Not fun... Many headaches.
The encapsulated trip bank assembly is not service friendly!
I too need the metal ball capture plates in order to get the game done and finished.
I had a good machinist modify a Gottlieb part in order to make it fit the metricly designed player advance assembly.
Note: I used a Gottlieb backing blade that is used on the E.O.S. switch to add extra tension to the carryover switch of the 10 step advance unit for the bonus feature.
Know the primary bonus advances every time you complete the sequence.