Yeah I could just get the value in a Query. But in this case the way that it is being used and how often, it is just so much easier to have a second field in the table.
Mainly because it will default it to the 180 days when entering ... but yet still remain editable on a record by record basis.
Again, thanks for your help. I knew there had to be a way with Data Assist. I'll give that a try.