Quote Originally Posted by neuroanatomist
Depends on your generosity. "If it ain't broke, don't fix it." But, since the 450D doesn't do AF microadjustment, it probably just means you'd need to re-adjust for your camera once you got it back.

That's exactly my problem...it ain't broken at all. Except no-one else can enjoy my lens. I don't mind to re-adjust my camera again, I'm just worried that the lens will function differently afterwards (instead of reliable inaccuracy). Hmm I'll sleep a few night over it since I don't really want to lose my lens for like 3 weeks or so...