I had a 210 from River for about 6 mos before I sold it and it was fine. If you're careful when screwing down the crown, you probably won't have any problems. I'm sure you've read it here before, but applying light inward pressure while turning the crown in the UNscrewing motion until you hear a soft click, then proceeding to screw down the crown is the method of choice. I use this method for the lug screws on Luminors, the tiny lug screws on the Rads and *any* screw-down crowns....