I dont even use the std shims anymore, use project mu shims, its one shim and its coated in a rubber compound to absorb frequency (that causes squeal)
The pads will probably wear in to contact the rotor surface, just give them a hard time.
My turbo to manifold nuts came loose at track once, i tightened them up when hot and never had a prob since, no locking tabs or special nuts, no flex joints.