a pair of {HEAD ~ secondary springs} for adjusting {TAIL ~ the spring rate} of said at least one pair of primary springs, said secondary springs each fastened at one end thereof directly to said arm and at the other end thereof to said head 
a pair of { HEAD ~ secondary springs } for adjusting { TAIL ~ the spring rate } of said at least one pair of primary springs , said secondary springs each fastened at one end thereof directly to said arm and at the other end thereof to said head
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL 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