So far 47 posts on this subject (48 with mine) - I think it is high time to go outside and and use the damn thing!!!!
I have always liked the metal lever as it makes these tell tale marks on the shutterspeed dial. Amateaur: Dents on 1/125 and 1/250, Pro's 1/50 (flash synch), 1/250 and 1/1000, M used on a Reprovit or Microscope: heavy dents on B and 1 sec, with occasional forays into 1/2 sec and 1/4 sec territory!!!
The plastic tipped M4 and later advance, nice as long as the tip stays on, miserable when it breaks and fall off - way too short and sharp!
The good thing with Rapidwinders/Leicavit's and Motor/winders - it doesn't matter!
Ok, now you can either go to sleep (European/Japanes time) or go out and shoot!