A question came up on how to change a family system parameter from Type based to Instance based.  It made me think of the good old days when we had to start a family, say structural foundation or door family, change it to a generic model family, go into the family types and modify the values from Type to Instance then change the family type back to the original category.  Good news is this changed way back, now all you have to do is select a dimension with this value and toggle the check box in the options bar to Instance.