Can I go back to old CSC coded version and get back OTA?

[AC Question]

I have updated my galaxy s6 edge to the latest nougat 7.0 that has released in UK. For that I had to flash my phone through Odin. I was on XSG csc code, where in order to go nougat I flashed XEU version. The issue is, Will I get to update my phone through OTA anymore or is there any way I would be able to do that. I have heard if the CSC isn't matched than OTA stops. But I need the OTA updates as nougat is still in it's early stage, should get more updates. Please reply and provide me suggestion