If you use your old CFG, then some markings may be missing or not in the right spot, causing your markings to appear different to others. I could be wrong, but as of now I have not seen a pack that successfully blends the new markings with the mass markings. People say Legendary Markings work with the new update, and yes, it does, but when I downloaded it I found that it reverted all the new and designed markings that came with the update back to the old ones. If that is a sacrifice you could make then I would just recommend downloading the legendary pack. Not sure if this issue was ever fixed or not.