Unfortunately, no. There is no way that I know of to take the casing off. If you are within the trial period or even about 60 days out from purchase you should be able to still exchange them. I know I’d be able to do it…
The ceramic ones are pretty sharp I’ll agree…but they are also more expensive. I believe they only come in the IX level as well. I’d go into your pro and just ask if you can switch to the ceramic ones…the worst they can do is say no. But like I said, if it’s within about 60-70 days of getting them, you should be able to exchange them without any problems…