[CQ-Contest] CW Weight

[Joe]

Ok is there a similar "Calculator" that determines the difficulty of a 
call to be sent or copied?

Ya know ease of sending and hard or I should say easy to mis copy when 
listening to it.

We all know of CW "Weight"  How long it takes to send.
A calculator here...
http://www.radioqth.net/cwweight

But is there for difficulty to send and copy?

Like lots of "L" "F" or the ever popular "S" "H" etc.

Joe WB9SBD
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