Just an update.
I've had a few people ask me about how the Nano compares with other VNAs. I will ask for specifics but it seems to be a more general question in general. I think the last person asked about reliability and I responded that I had the Nano for a few months but my old 8754A has spanned five decades now and still running. (with the original capacitors BTW lol)
I see where there continues to be an effort to produce a 3GHz pocket VNA that doesn't use harmonics. If they come up with a product, I plan to have a look.
Playing with the Nano may end up costing me a chunk of change as it's rekindled my interest in replacing my old VNA. I am reading up on the more common instruments available today.
I was thinking that I may do some sort of video that compares these four systems. Obviously reliability can't be a metric but if you have something you would like to see, feel free to chime in.
A few things off the top of my head are noise, cost, features, noise, stability, accuracy, noise, dynamic range, ease of interfacing it with a PC, noise and sweep rates. I may do something with noise while I am at it.