{HEAD ~ The method} 1, wherein {TAIL ~ the step} marking step involves marking the shank hole location with a marker 
wherein
{ HEAD ~ The method } 1 , wherein { TAIL ~ the step } marking step involves marking the shank hole location with a marker
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH