In my original post, I had not considered using different stub lengths. That's a good twist. 100 ohm cable and connectors may pose a problem. It seems like the definition of works has changed to reduced performance. "No reason it won't work - at least to the performance of the NanoVNA."
If the mismatches are no problem, the home made transfer relay gets more interesting. Getting one to work at lower frequencies with minimal leakage shouldn't be too costly.
