not a physician) when I transitioned in the opposite direction you are going.
Be sure
to have a written record of your current basal settings. You may
need to shift-in-time my basal settings.
For example, let's say I had a basal rate of .5 from 12midnight until 4am when I was using Humalog in my pump. To get a similar basal coverage, I would "shift" that time to say ... 11pm - 4am. And do the same "shifting" for all my blocks of basal rates. Write 'em all down.