Preferably, the contact spring part is {HEAD ~ approximately the length} of the rear section of the guide pin to optimize {TAIL ~ the mechanical connection} 
Preferably , the contact spring part is { HEAD ~ approximately the length } of the rear section of the guide pin to optimize { TAIL ~ the mechanical connection }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL