Im an engineer so i understand the concecpt of shear pins, and i understand the fact that the gymbals can be too ridgid, what i dont understand is the cheap and nasty materials the drop pins are made of, which means if the drone is shocked the washer flys off the pin so in effect the drop pin has failed to do its job, maybe the damper is lost,the drop pin is reusable because it is captive but you have to buy one set of dampers and two drop pins and two washers.
I now have 9 spare dampers, i have to now buy a further set because the washers/drop pins are not available seperatly does this make any sense at all except to make money, seems almost like planned obselescence, make a profit from a captive market, the fact that they are cheap (I wouldnt call £15 cheap for a few bits of rubber) is immaterial, three knocks = 2 props (ok np) 3 sets of dampers = £45, and now 12 dampers spare.
Also i fail to see how four pins would make it any more ridgid than two, its not as if they are tight fitting they are about 1 or 2 mm in a 5 mm hole, like i say you cannot lose the drop pins just the washer off the top.