Hi, as the mileage counter for Tier 2 does not work to complete the Mastery, here's a small mod that unlocks it. Place it in your DLC folder, go to Mastery Rewards and now you can activate it. You'll find it southwest of Attenborough, it's lovely. https://www.trainsimcommunity.com/m...d/c19-patches/i4271-tsw4-mml-mastery-unlocker
