If you're just adding one or two of these, then fine, they are easy enough to assemble and install.
But if, like me, you have to do a bunch of them in a row (MoogerFooger FX pedals) then not only is it a real pain, but also it's very difficult to get them aligned properly.
I can't think of a better system, but it just seems like there should be one somehow. Like, once you've decided on the rotation position, you should be able to lock it, then once you've decided on the arm position, you should be able to lock that too. But instead there's a lot of to-and-fro adjustments. And then you tighten it all up and you discover it moved while you were tightening it and you have to do it all over again.
I guess that's the price you pay for the flexibility, but like I say ... I just have a brain itch that says there should be some easier way.
Still, once you get them finally in right, they do the job and I will buy more as the need arises.