Changing fuel filter on an 05 620. Do I really need the mounting screw?

[iltl32]

So I bought the NAPA fuel filter instead of the OEM one, and it doesn't have the little plastic tab on it.  I cut the tab off of the old filter and reattached it to the flange unit with the screw to keep the ground wire working.  Do I really need to use something to secure the new filter to the flange?  The tubes are very rigid, and it doesn't seem to budge at all when I shake it.  This tutorial - http://www.ducatimonsterforum.org/index.php?topic=17213.0 - used a hose clamp to fasten the filter, but I can't seem to find a clamp that's the right size.  The smaller ones are a bit too small, and the next size up the shop has are way too big.  In my area I only have 1 shop and then Harbor Freight, who only has Zinc clamps with can't be submerged in fuel.  I just want to get the damn thing back together.  Any thoughts?

Also, I was thinking maybe of using a nylon zip-tie.  Can't seem to find a straight answer as to whether or not they can handle gasoline with ethanol.  Anybody know?

[Dirty Duc]

I don't remember securing mine in any fashion... although I could be wrong.  That was over a year and 13k miles ago.

[ducpainter]

The ground wire is for the plastic filter to prevent static.

The older steel tanked bikes used metal filters and had no ground strap.

How about a zip tie to secure the filter?