GCP - save state

First of all - Thanks for a great job in making this incredible system, you guys are amazing!

My suggestion:
There is quite an effort to make those GCPs matching and often take quite some time to do this. It would be helpful if there was a possibility to save the work so it is possible to continue later, or just to make it temporarily safe saved.

Wy worst fear is to have 90% done and then for some reason something make it impossible to continue an that i have to start all over again.