I don't recommend it
I had a CDI furler on my old Grampian 26, and it was just adequate to the task. There were no roller (ball) bearings on the unit, and furling it was a bit of a chore. I can't imagine how much more difficult it would be with the sail area of a C30. Having said this, I do feel the CDI is a bargain, and it got the job done on my 26.