One more tip I learned from this: if your project is scaled in anything besides centimeters, you’ll need to change the scaling of your new alembic export (including all of its children). My project is scaled in inches, but the alembic automatically scaled to centimeters, which made my new alembic object way too small (hopefully in future versions, C4D will have the alembic object automatically scale to the project’s scale). Do this by selecting your new alembic object and all of its children. Then, in the attributes panel, change the scaling to match your project’s scaling and then adjust the number value to get the size you want. See attached screenshot for how I did it. I hope this helps others who run into the same issue I did.