@sadness20,
Truth; the sticky pad cannot be removed without ruining it. You might ask Thermalright for a new one.
@dragonsprayer,
Half an hour or so of lapping has my 120 eXtreme very flat, and consequently I am using minimal TIM. I spent about $12 US on an assortment of sandpaper- 220,400,800,1000 and finished with 1500 grit.