To recreate: 1. Create a new bibliographic record in the basic editor. 2. Edit the 000 Leader position 6 and select o for Kit. 3. Look at the 008 and see it defaults to VM or visual materials. According to Library of Congress a record type of Kit is "a mixture of various components issued as a unit for instructional purposes." It seems that the 008 should then default to Mixed materials. It is a little confusing because there is a record type for mixed materials which is similar but NOT for instructional purposes. Regardless, a kit should not default to visual materials in the 008, because that is not a correct type of material. It is not possible to select Kit in the leader and then select Mixed materials in the 008. The system will not allow the two to exist together.