Talk:Research & Development/BMW 3.0 CSL Hommage/@comment-38110110-20190402142402

Hi all, I got a question. I claimed a free ClassA upgrade. I will get a ClassA BMW only upgrade after completing test27. So, if I then upgrade my Nitro lvl4 to lvl5, which upgrade gets used ? - BMW only one from R&D or the any-car free upgrade lying around in my inventory.