Yeah, it turned out the vibration was coming from my wheel/tire, not the trainer. My roadmachine damps out the vibration between the pressure on the wheel and the heavy flywheel. Once I got a new tire on my bike the omnium smoothed right out.
It’s a great trainer, I use it for 95% of my trainer rides, not just warmups. It’s never going to have the inertia of a trainer with a flywheel, but given it’s easy setup and light weight I don’t regret spending the money one little bit. After a few rides you get used to the lack of inertia, it also really helps workout dead spots in your pedaling because you can feel every one of them.