It sounds like no one looking closely at your block can see the mistake. I certainly think with the expertise of the ladies on this board, telling you it won't be noticed/we don't see it, forget about it. I still remember an early art class in college. We were all told to draw this table monstrosity, then we had to put our drawings up and the class had to critic the work. I was one of the first, and I said I thought it was off, crooked--my teacher a bit of a snooty guy, looked at me and said it is not off. It was well done. You could have knocked me over with a feather. We critic ourselves way too hard. You know, if this had been put up by anyone else you too would find no fault in their work.