Hi Tim,
you can export XMPs which contain the exact camera positions and if those are present, then RC will use this info instead of re-calculating when you click alignment (I believe, been a while). That means that if you export your components with enough overlap in the cameras and don’t go near the edge for reconstruction, the differences should be marginal. Depending on the purpose, the seams might be acceptable, they could be hidden in corners or just combined and re-meshed in a third party app…