is a laptop emergency? As many of you may know, kensington smarttips are EXTREMELY delicate. so mine split in half and its hell having to hold it in the right way to get power. i have a toshiba satellite, and i need a N3 tip. Kensington does not have them single yet and the one that it coming soon will have the N1 and N3. Waste of my money. so any good place to buy this tip? even used/refurbished that usually gives you good service? Any places to avoid? Any common chain stores? I saw that unitedsale.com had VERY bad reviews is this true or should i go ahead and get from there.