Originally Posted by rachilders
FWIW, I haven't had any trouble swapping the two uppers but it did take a good push with a small hex key to get the pins loose, at least the first few times I removed/installed the uppers. After working them a bit and adding some oil the pins are easier to loosen now but they still need a push from the opposite side to get the pins moving. It sounds like it may be a bit more trouble than it's worth (at least for now) to replace the pins so I may just see how it goes for a while and decide later.
BTW, Thanks for the replies.
I imagine that was the point, that's why they stick out a little.