Hhmm. Hobbyists typically use leaded solder, while manufacturing uses non-lead solder. I'd think leaded solder should work fine with silver, not sure bout non-lead. Always wondered if silver coated springs is real silver, or do they cheap out on the thickness of the coating so much, the bonding is a problem.
Do you mean the XHP35 HI version? i dont know, Haikelite only mentioned briefly yeah could be that one. but frankly i have no idea but that one is a zoomy right so that could not be it?
yeah Pete7874 also has the same spring problem, i notified Haikelite earlier and they are aware of the problem.
I opened the board from MT02 and MT01, i noticed that the solders are not flowed properly and the solder was rather dull no wonder you could crack the solder easily. i had to reflow that and replace the solder with a usual leaded solder plus a little flux and it was also only soldered on one side. I wish they could improved that, kind of ruined an otherwise a good quality light.