I have both this and the new rear cover replacement from Biqu (not purchased from West3D), and am extremely happy with it! The reduced weight and improved cooling is great and the improved cooling ducts are fantastic!
One thing to note: I experienced this and it's been reported by others that some units can still have 'sand' in the fan ducts from the manufacturing process (how MJF nylon parts are made). This can easily be dislodged by repeatedly hitting the ducts on a hard surface and blowing through them with compressed air. Do this process several times for each duct to ensure they're clear.
