Whatever the case, the most prudent strategy for bin makers would be to make the eyecups a bit longer to accommodate those who need the extra length, and instead of making three or four stops, find a way to make the eyecups continually variable, so that you can slide the eyecups to any position, from all the way to all the way down and anywhere in between. Doing those two things would accommodate 99% of us, and there would be no need for redesigns like Swaro previously did with the EL eyecups and like Zeiss is doing now with the Conquest HD line.
Win-win situation for the companies and their customers.
Brock
That's my tale make them a quarter inch longer and they should work for everyone, see my CL pocket thread to see how I solved this issue for the mini bins.