I think that would not be very cost-effective. The landing system on most 6010's was not very accurate, just mfs and rail switches. Are they planning to re-use the DCV motor? I mean if you are going to replace the landing system, and use an ACV drive, you might as well do a complete Mod. The only way it might be feasible is that they are trying to get around building code requirements. Like if they change the controller they have to add fire service and shunt trips to the building. Interesting.