santra: The two ways your files grow are

(1) if you change the sync settings on your iPhone. Then you need to re-run the script.

(2) if you haven't synced a particular computer or iPhone recently. Then you need to sync that computer, wait an hour, sync it again, and your files should shrink on their own. If you will never sync that machine again -- because you don't own it anymore or whatever -- then you should run the coalesce script. (My database swells every weekend, and settles back down by lunchtime on Monday.)