In the 'Select' tool, you have the ability to output the select configuration. At this time that configuration file doesn't include the information (which you do in the check box of the select tool) on if it is a field that is output. Not a big deal if there are only a couple fields, but quickly becomes an inconvenience if there are a lot of fields and you have to compare going down the list to make sure you're accurately identifying which fields from the original select tool, are actually output. That info should be part of the .yxft file that's output for the config file.