Looks like you got most of it. 
I will add this regarding the 1976 40% silver Eisenhower dollars:
1. Unlike previous 40% silver Eisenhower dollars, they were not sold separately in brown boxes or blue packs.
2. They were all sold as a part of the three coin bicentennial sets (uncirculated and proof).
3. They are all Variety 1 (1975 reverse).
I will add this regarding the 1976 40% silver Eisenhower dollars:
1. Unlike previous 40% silver Eisenhower dollars, they were not sold separately in brown boxes or blue packs.
2. They were all sold as a part of the three coin bicentennial sets (uncirculated and proof).
3. They are all Variety 1 (1975 reverse).





















