In a preferred implementation, a solder alloy consisting essentially of tin 96.5% to silver 3.5% with a melting point of about 221° C. is used to attach {HEAD ~ disks} 10 to {TAIL ~ AGA} 50 at solder joints 55 
In a preferred implementation , a solder alloy consisting essentially of tin 96.5 % to silver 3.5 % with a melting point of about 221 ° C. is used to attach { HEAD ~ disks } 10 to { TAIL ~ AGA } 50 at solder joints 55
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 HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH