I have been playing for about a year now and have got the basic chop chord shapes down, somewhat, but when I watch live bluegrass the mando player's all seem to be lifting on and off their pinky during there chop, as I have always left all my fingers on but lifted them to mute the strings. I have played around with what I think they are doing, but I don't get much of a difference out of it. I guess it helps with the muted sound?, but I am not sure exactly how to execute it well. Any advice from accomplished pinky lifters would be great. I am always looking to improve that chop.
And while on the chop subject anyone care to share more obscure chop chord shapes they use.