Thinking about picking up another Tag. I'm looking at the Grand carrera on black leather strap. http://www.replicamake.com/product_info.php?cPath=131_266&products_id=1293 Are there any problems with this watch? Haven't decided if Ill go with 7750 movement or quartz. Does the 7750 seconds chrono run smoothly or jerky? Is the quartz versions long seconds hand always in motion or only when you press the chrono button to activate it? Thought I would ask here first for opinions, since its an expensive one. Thanks.