Grommet for 1" Hole

I needed a grommet for a 1" hole that needed just a few wires going through it. I added holes for zip ties if needed for strain relief. This is a derivative of this thing:
http://www.thingiverse.com/thing:4880

NOTE: Modifying a power supply as indicated in the pictures violates the warrantee, and is obviously not UL listed. Don't use it for what I did unless you want to throw reckless abandon.