The insert provides the means for {HEAD ~ numerous adjustments}: forward and backward in {TAIL ~ the slot}, cant or fin tilt angle by changing the insert, and different fin types 
The insert provides the means for { HEAD ~ numerous adjustments } : forward and backward in { TAIL ~ the slot } , ca nt or fin tilt angle by changing the insert , and different fin types
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH