Hi Mark, if it is a movable system, then it will be hard to manage same camera position for each set-up. But for one person it should work. Then you can use the XMPs, but you will need to create a new one for each of your model.
If there are markers, you can export coordinates of those markers and use them as GCPs in next process https://support.capturingreality.com/hc/en-us/articles/360012872579-Export-Control-points-with-XYZ-coordinates