Possible to use Charm in Solman 7.0 and 7.1 for same landscape?

Has anyone tested this? For many reasons, we are leaning toward a fresh install of Solution Manager 7.1 vs. upgrading our 7.0 system. However, we have several ongoing projects using Charm and would need to run both the 7.0 and 7.1 systems in parallel for some period of time while transitioning those projects. On any given day our Charm users create and process several Change requests/urgent corrections. While allowing them to close out existing maintenance projects in 7.0 they would need to create new changes in 7.1 for the same landscape. Is this possible? Our dilemma is determining the best way to migrate Charm projects to a new 7.1 system without too much disruption.