As the original poster, let me jump back in to the thread.
I want to stress this is not a high-tech, precision-machined tool. If your version varies by a millimeter here or there it should still perform its basic function. It is a very basic approach that solves the need to properly locate the shift lever when adjusting the ZF.
I cringed when I read the quoted cost for your 3-D printed version. I’m glad you have taken a different approach. But for others following this thread, please do not overthink this.
Larry