{HEAD ~ A third aspect} of the invention provides {TAIL ~ a shim} for arrangement against a structural component, the shim having a shim surface which is provided with a first feature defining opposite ends spaced apart by first distance and a second feature spaced from the first feature defining opposite ends spaced apart by a second, different distance 
provides
{ HEAD ~ A third aspect } of the invention provides { TAIL ~ a shim } for arrangement against a structural component , the shim having a shim surface which is provided with a first feature defining opposite ends spaced apart by first distance and a second feature spaced from the first feature defining opposite ends spaced apart by a second , different distance
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH