Lately I've noticed my booster (Salsa Carbon, on a Simtra) has been flexing quite a bit. I like my brake to be f**king stiff, and every other part of it is damned expensive, so it's a waste of all my money if my brake is mushy because I have a shitty booster. I want to hear what boosters are stiff as f**k. Has anyone tried one of those 74Kingz boosters from tarty? They're damned expensive, so they must have something going for them...