All you can do is try. Nothing ventured, nothing gained. I wasn't aware that transitioning could be tricky. I have a friend who switched years ago and I think it was pretty quick--reducing Imuran while introducing CC. Several years back I switched briefly from CC to Prograf and was told to just make the switch. Unfortunately, the use of Prograf itself was a failure, so back to CC I went--and remain.

Good luck!