You should send them an email about the plastics and find out. I'd be interested to know
I received this response from Pam at Pinbits regarding the small plastics included in the TZ Protector Plastics set:
"We make the clear set from the original drawings for TZ. No one knows for sure where all the small pieces go. I have two small pieces on the front ends of my Magna Flip Playfield (the ball can sit between the posts) and I believe one should fit on top of the rocket plastic but the post is missing. Perhaps the design was changed before production… I don’t know I am only guessing.
Who ever figures it out wins a prize."Matthew