The discussion treated mineral removal and sanitation as separate tasks and identified reservoir access as part of the labor scope.
The same symptom can have a different cause. It can also require a different maintenance procedure. Chemical compatibility, concentration, contact time and rinse steps must come from the exact model and product labels.
The technicians considered the Viking layout visually similar to a Scotsman design. That comparison can help identify likely panels and reservoir placement, but it is not a substitute for the Viking service instructions.
The expert endpoint is model identification before chemistry: confirm the Viking service literature, approved descaler and sanitizer, concentration, contact time and rinse requirements for that exact unit. The Scotsman similarity is an access clue, not a cleaning procedure.