<HTML><HEAD><TITLE></TITLE> <META http-equiv=Content-Type content=text/html;charset=ISO-8859-= 1></HEAD> <BODY style="BORDER-TOP-STYLE: none; BORDER-RIGHT-STYLE: none; BORDER= -LEFT-STYLE: none; BORDER-BOTTOM-STYLE: none" text=#000000 bgColor== #ffffff>Hi I'm guessing the English action refered too is more o= r less similar to the following diagram. As you can see, the key= has to pretty much make it back up on its own.  There is a repeti= tion spring to bring back the jack however, and if the hammer is checke= d high enough and the return spring is strong enough it is possible to = get the jack under the knuckle quite quickly, aiding in the return of t= he key.  That said, the key has to be friction free enough and wei= ghted appropriatly. It simply has to get moving on its own. Not = much you can do except regulate checking as high as you can get away wi= th, get rid of excess friction, and make sure you have enough weight ba= ck of the balance rail pin. Cheers RicB <IMG alt=""= src="moz-screenshot.jpg"> Ed writes: I dunno what is i= nvolved in these actions.  It would be easy enough to place a = weight on the end of the key and see what happens. regards, &nb= sp;   Ed Foote RPT </BODY></HTML>