well i obviiously know that the 180s are more durable, but for being COMPOSITE, the 140s are still more durable than other brands as far as my experience goes. I also know that while I love elastic travel and it has saved me more time than I can count in sticky situations, it does give you lesser precision.
And I guess my tech and one of the rossi reps that went to the boston ski expo are completely wrong and you are right, but they told me that the pivots were discontinued because they didnt perform as well and the super low ramp angle/binding height of the ski were the reasons, but they noticed a huge following of the pivots on ebay and other buy/sell sights that freestyle skiers would buy old race skis with the bindings and take the bindings off to use as park/freeride bindings, and the onepiece metal toe gives you more leverage because you have a rod from the middle of the ski that is higher up than the platform, but the 140s give you better edge because the full platform is covered by the binding. fully, the 180s have more advantage as far as leverage, and since they are more durable for racing than the plastic they stuck with that i guess, but just shut up becuase I own a pair of titanium construction px jib 14s that have the same design as my fks 140s, but again its a different heel. if they used an 18 din spring in a plastic binding, I would guess the mechanism would, over time be too much for the composite housing, eventually weakening the intregrity of the binding. this is also another reason there are only metal housed bindings in the higher din ranges. You never see a marker binding that looks like a jester for racing. they are always metal.
Yes, I own a pair of the black fks 140s from a few years back and ski in the ice coast. I ski aggressively and ski about +110 days a year. I have used my friends 180s very frequently, and I honestly dont like the lack of hold that the binding gives my boot, it feels sloppy, and even thought they are made of metal, he broke them along with other kids on my team that have broken the 180s/18s, but not even my coaches can break the 140s
as far as the last statement you made, FIne you dont have to understand why I do, but if you trash me, dont think im going to let you do it without a fight