I am still new to the world of hydros- but just when I have my front brake pefectly dialed-in(zero rotor contact)....I have to re-shim the front caliper every single time I remove the front wheel. This frustrates me to no end. I even use the yellow transport device, included with the brakes, and I still have to re-shim the IS mount caliper. Why is this? Is it the wheel skewer tension? I cannot figure it out. My front wheel needs to be removed to haul my bike to trails, on my truck bed. What affects the rotor's changing position? I am going nutz here. The brakes are 2007 Marta SL. Thanks!!!