I acquired the Korg NTS-2 Oscilloscope in an Amazon special which came with the book "Patch and Tweak" - so figured I'd film the building process and immediately follow with a sample use scoping the background bass line beat to this video. I found my Mordax Data Oscilloscope module on my Eurorack absolutely a must have - for everything from a Tuner to a Voltage meter, and I really missed it when I was using standalone desktop synths. The Korg NTS-2 Oscilloscope really seems like the best value option for me.
The scope is quite useful for my non-eurorack gear because:
I can move it around easily
it runs on batteries (2 AA)
it has 2 inputs and thru ports
it has a TUNER (!!)
it is TINY!

Chapters of this video are simple:
0:00 - unboxing
0:20 - building
1: 33 - Scoping!

loads more features than I tested so far... happy to try some for viewers who have specific questions...