2001? Mba?
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OP, why don't take a look to a MBA (or, for the case is the same, a MBP) in some store? And simply check against yours. Check the pressure you have to apply and the clicking feel.
Have a close look at yours. Check for some minimum obtrusion you can have, for instance a piece of cookie, etc. Eventually use a bottle of compressed air all way around. I got something removed from underneath my keyboard that way. I used to borrow my kids my laptop...