P.S Sorry my question is coming out from not have any connection to this topic.
Talisman/someone, as a bat maker if you could tell me what is actually willow grading ?? I know good bat makers get different grades of willow and then further grade its self. How is that being done ?? Does grading make willow quality better in its performance/density 
thanks
Generally JS Wrights grading system is used, which you probably know. This allows a high percentage to grade based on the "MGS" [money grading system] if it looks good sell high...
There is no standard grading system within the cricket bat industry you could be sold a beaut of bat that is an absolute dog to play with because of the manufacturering process and an ugly looking bat that is excellent because it has been made well....
In general though MGS is used this is not a new phenomeon though...
Close grained red willow was favoured by W. G. Grace and others for its superior driving powers and mammoth hits. By the end of of the 1800s the fashion had shifted to almost all white wood cricket bats
this had no real foundation other then from the salesmans point of view a white bat probably ‘looked’ better in a sports shop window. This inturn lead to willow hybrids and “Salix Alba Caerulea”.