Quick question, with the new release of the "C-5" hardware revision I notice the FAQ says the original version is referenced as "C-4" but I notice my HE says it's revision "C-3"? Was there a "silent" revision at some point?
I suspect you're right. The very early hubs don't have much branding--the hand-painted "#26" on the bottom of mine is the only added touch besides the MAC address sticker (though I guess there is the "Hubitat" label covering the Nortek branding on the USB stick). That shows as a "C-3." A hub I ordered much later for testing/development has the spiffy logo on top and shows as a "C-4."
Clearly, I need to order a "C-5" to complete this picture.