Lol, yes @framerate - works = 4K@60Hz.
@NZgeek, @Techmo -
And yes. the Apple TB3 USB-C (0.8M) cable is working. It is supporting the following -
Display at 4K@60Hz; Keyboard, Mouse and LAN via the USBC Hub on the back of the monitor. So, for now, I have a true one-cable solution. When I get my second Spectrum, I will then have a two-cable solution. I just need to find a longer TB3 USB-C cable that supports display.