Check the spacer in the Design Screen by viewing underside of restoration (remove Model Box in the Analyzing tools).  This will provide assessment for spacer.  Important…check the spacer first after proposal of restoration.  If Spacer needs to be increased because of spacer shine through assessment, the full proposal will be repurposed rather than just the spacer being altered as we saw in 3.85.  In most cases, I am not seeing spacer binding issues in 4.0 full crown mills with a 60-80 setting.