@DocHoop I am pretty positive that there has to be points in the background as that determines the weights (for example an A on a homework assignment and then a C on the final would average to a B if they are weighted the same but my guess is no one would ever have the final and a homework have the same weight in a class). You can use Letters though still when you grade. When you create the individual assignments, instead of points, select Letter Grade. Then when you give a letter grade, in the background it assigns the highest points possible for that letter. For example, an A might be 100% of the points.
Not sure that answers your question or not.
-Nick