Baiter has been playing mine, and it is the easiest gem shot I've played on. I'm convinced, but not 100% sure, that this has to do with the angle of the upper flipper at rest. I played at the PHOF, and the shot was nearly impossible (I never made it), and I noticed that the flipper was not aligned with the hole at the tip of the flipper...it was resting all the way left against the wall.
I'm afraid to rebuild my upper flipper for fear that I'll make the gem shot harder.
Also, my outlane posts are all the way down, which might explain why SOS is so easy.