Press it down. Don't mash it — if it doesn't move, it doesn't move. But give it a press, and see what happens.
Yes. I have contacted G66. Let’s see what their technical staff will say. Mostly I would like to know what is causing the difference in length. If it’s just a particularly narrow knob that has not slided properly on the shaft, I don’t have a problem with it at all. If the shaft itself is longer, I wonder if it depends on something wrong under the hood that can cause problems further down the line.It does look a bit high in the picture. Works just fine, I’m sure, but you could always contact support and ask about it.
Done and done!Update: I solved the problem with the precious help of G66. I had just to press on the knob with a lot more force.