System Upgrade

Manufacturer (Zeiss, Leica, Olympus, Nikon), Exact Model, Brightfield or Fluorescent, Motorized components (internal focus drive, filter turret, objective turret, condenser, etc.), Objectives, Filters
Manufacturer (Ludl, Prior, Marzhauser, ASI, etc), External motorized focus drive, Slide sizes that you are using
Manufacturer, Exact model, Color or Monochrome
Manufacturer, Model