It's extremely time consuming to have to go to each individual table to create a custom key for comparing tables. Even with the common option of holding Shift to select a range. I have databases with hundreds of tables, and not all have a PKey. It would be nice to have an option that automatically selects all columns on the Tables & Views tab. You could even offer other options to select certain columns, or other ad-hoc options, for what columns to use in the compare process.