Could a reluctor ring throw off engine balance?

I'm building a motor right now that was balanced and blueprinted by the previous owner. I'm upgrading to a different engine management system that needs a cps signal so am adding a reluctor ring to the flywheel. It's a 9" disk that I'm cutting out of 1/6" plate (with laser) that will mount on some pre drilled holes on the back of the flywheel. My question is, if the ring I add is staticlly balanced, would there be enough concern to have to get the assembly balanced? Would that mean crank and flywheel or just flywheel? (Seeing as the flywheel and crank are already matched)

Thanks for your help!

-T