What I mean is that anytime you adjust a reed there’s a likelihood the tuning will change. usually it will go flat. So if you change the gap, you often need to tune up afterwards. The frustration can be that the process of tuning will sometimes impact the reed shape or gap and require you to reset, followed by more tuning. It kind of sounds worse than it really is, but it can be frustrating at times.
When you do a few you develop a feel for it. There was a time when I was doing a lot of harp work and got fairly slick with it. I think it’s one of those things where once you have got it worked out, it doesn’t really leave you. You just need to do it enough to get the feel.