Quoted from Kawydud:
Pull that metal guide off in the center before playing a game and get some washers between the studs and the guide, so it doesn't cut into the playfield.
Yep. Did that and added my usual protections to the shooter lane, outhole areas before ball 1 was played.
I use these to add protection anywhere mylar would be used. They are easy to cut and apply, and can be readily removed later if needed or get dirty, etc: https://www.walmart.com/ip/Avery-Self-Adhesive-Laminating-Sheets-9-x-12-10-Sheets-73603/29815043
Also turned down the trough power to 180 (lowest setting).