In case where the blind corner cabinet may be a different depth that the Rest or adjacent cabinets.

The location of the Spacer/Filler is driven from the depth of the cabinet.  So, if you change the depth of the corner cabinet it will move the spacer location with respect to that depth. 

This can be overridden fairly easy to match the rest of the cabinets.

I would suggest, if possible, to have the default location talking to the depth of the cabinets at the project level.  This way when you change the depth of the corner Cabinet it would still line the Spacer/Filler correctly with the cabinet next it.