Changing GL's

We are considering changing our GL template from ##-###-####-!!!!!!!! to #-##-####-######-####-!!!!!!!! We are doing this to match our accounting software Financial Edge NXT and so that we can do better tracking of our performance costs across multiple systems, I was hoping you can tell me what things we might want to consider, what concerns you might have, what would be the ramifications doing it mid-season? I what ever you can tell me would be helpful. Thanks, Jason