Inventory Interface On - WIP Capture - Posting to GL

We have been running vantage for the past year with the inventory interface
turned off. We would love to turn it on, however, our controller does not
want the COS posted for him. I did some reading, and it says that these
transactions are not posted until the Capture WIP/COS is run. On this,
there is also a checkbox 'Do Not post to G/L'. We are hoping that we can
turn the interface on, and check this box, and it sill give us the entries
but not post them. Can anyone who has the inventory interface turned on
confirm if this actually happens?

Thanks for any insight you have,