I don't have any trouble syncing stored Revit models to TwinMotion, but I'm unsure how to link a model that is in various stages of design and needs to be updated as I've mentioned throughout those stages.
Hi ,
The Twinmotion Datasmith Exporter plugin for Revit should be suitable for your needs. Using this plugin will allow you to create a Direct Link sync between Revit and Twinmotion. Whenever you make changes to the Revit model, you can easily synchronize the changes into Twinmotion. We have a Youtube tutorial here if you would like a demonstration.
Best,
Raghib