Modded 450D help

[CThody]

Hi. I modded a 450D this week, just taking the filter out and not replacing it. Should I be using any other filters when taking pics now? Having tested it on a clear sky last night, exposure times are shorter but it is more sensitive to pollution from street lights.

What white balance setting shouldn't I use? I noticed I can get rid of much of the pollution by changing the white balance in the Canon software after download but can't work out the setting in the camera. Is it normal for a modded camera to be more sensitive to light pollution?

I have a clip in light pollution filter that clips into my 50D ok, but not the 450D, it drops out!

Any advice much appreciated.