As you can see in the attached photo it is clearly off-centre. However, if you mark it like I did, you can still find the center with the square you see in the middle. You don't have to do this, and it's very disappointing that it's not centered. It also makes me question every positive five star review. This type of instrument needs to be made to precise specifications and dimensions, and they all need to be exactly the same. If so, they'll all be off-center, and there's no excuse for that.
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