Absolutely awesome! I was fighting with camera module 2 weeks ago (resulting in broken autofoxus in two camera modules - it works ok only for up to ~14 cm, don't want to focus on further objects, even via manual adjust, as per fcam or camera-ui from cssu), as night-vision via N900 was idea that "struck" me more than a year ago.

To be honest, after looking @ camera module internal, I haven't balls to try removing filter. It seems, that your first attempt resulted in ruined (scratched) sensor, but You know (now) how to do it properly.

Could You share Your experiences here, as detailed as possible? Some guide for removing (replacing by regular glass?) IR filter in N900's camera module would be great
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OTOH, how You have destroyed original module by removing it (what happened)? Also, do you think that it's possible to fix broken autofocus on such module (or problems like ones I've described, with ~14 cm max focus distance), or module looks too delicate?

/Estel