I am a big Millennia fan, but I have to point out that the HV-3D wasn't even close to the most important thing in that signal chain. Ranking the elements by importance, they are:
I have one! And a HV-3D 8 channel. I’m seriously considering an Origin. I used to use it a lot in a studio I worked in. It was my go to. Love that thing.
If I record a vocal with a 47 > BAE 1073 > Retro STA Level.
Then 47 > STT-1 in full fat mode. Transformer, tube pre, tube compressor.
Then compare the two .... the first chain is a touch thicker for sure but not by as much as you'd imagine, I was very surprised when I first AB these two chains.
The STT-1 is definately a great unit, very flexible and capable of plenty of colour.