I just acquired a 2007 Anniversary Edition bike and need to replace both front and rear tires. I'd expect to dismount the brake calipers to make front wheel removal easier. When I do, should I plan to insert a thin wooden wedge between the brake pads to avoid having the pads close because the rotor isn't keeping them apart, or is that unnecessary? Is there a good explanation of the wheel removal process in the archives here? Thanks for your advice.