Switching to using the plug in objects only partially solves the compare to inventory problem. There is a fundamental flaw if you are using accesories, in that each combination generates another plug in object with the accessory associated, so short of having 4 entries for a Source 4 Par (one plain, one with barndoor, one with sidearm, and one with sidearm+barndoor) which then requires adding the quantities of those variations manually to compare to inventory, as well as being an entirely cumbersome key.
There is also no way to use plug in objects for accessories as they do not appear by themselves in the plug in objects list (they appear as sub-parts of the units they are attached to, and you cannot add anything but the entire unit to the display list.)