This whole thread is making my brain stem spin circles....... I just dunno why you would remove the custom, Jamie Marsh tuned ECU for some basic, generic, JWT garble.
JWT worked in its day. That day has passed, the sun has set. I used a JWT forever in my B14 and the NEMU blows that thing apart. Even if you are doing this for a back-to-back-to-back comparison, don't get rid of that Marsh tuned ECU for your car. That makes baby jesus cry out loud.