ok when you say new seat? do you mean just the seat or the carriage and seat? if your just replacing the seat then no programming is needed, if you replacing the carriage? and you have the sd card the original rail program should be on it and you can restore the program to the new carriage and then fine tune it, again its not an easy job, but it can be done, I have done it but I was talked through it by abd’s tech support, I wouldn’t recommend that you try it as you could do more harm than good if you press the wrong button! where in the country are you? maybe someone could recommend someone to do the job?
