I thought about doing that but any movement upward of the speedo will increase the gap at the bottom which may be more noticible since it is so close to a hard line.I noticed it, but as others have said, I wouldn't sweat it too much personally.
It's hard to tell how much play the trim ring gives you, but you might be able to egg out the top of one dash opening and the bottom of the other to get rid of some of the offset. If that makes sense.


