My new ORIS is running spot on, about 2 secs fast per day. I've owned many automatic watches and the rotors were always "free spinning". I notice that the Oris rotor is a bit "sticky", it doesn't spin freely. The rotor can stay inverted/upside down until I give it a little tap. Is this normal for this movement? The Sellita/Oris calibre is new to me, any thoughts?