I built a rear wheel rocker plate a few years back - the plywood, vibration dampeners and rubber ball design. Its worked great with my Kickr Core and bike, with the front wheel of the bike resting in a simple riser block on top of a wooden block.
I’ve now picked up a Zwift Ride Frame which I intend to use for all indoor training. Has any one seen or can suggest a solution for the front foot of the Zwift Ride Frame, so that I can keep using the rear rocker. I suspect the front foot as it is won’t pivot very well with the rocking motion.