STEP 15.   Re install the plungers making sure the Nylon end is facing the chimes

STEP 16.   Reinstall the small plastic washers onto each thread 2 per thread

STEP 17.   Gently push the rubber grommets back into the chimes

STEP 18.   Place the Chime back on the unit and reinstall the Nylon lock nuts but dont do these up tight i usually only
               tighten them until there is a few mm of thread showing