Rallye dash Tach retrofit?

Has anyone used one of these tach overlays (linked below) on a modern electrical tach?

I’ve been waiting months for the reproduction tach to be back in stock but my patience is growing thin. I’ve seen a lot of people fit a 3 3/8 tach into the position of the original centerpiece.


https://www.classicindustries.com/product/ma820146.html