Interesting that the removal of the cam stop results in weight-loss - I would have thought the original cam-stop design wouldn't have a significant 'weight' issue as such, as it's just part of the frame bent through to the inside? Whether leaving the frame 'solid' or pushing a bit through, it's still the same amount of metal? I'm guessing it's more that the smaller frame just doesn't leave enough room to create the cam-stop safely.