Friction Weight=(D-U)/2

[David C. Stanwood]

>Also, the 35 grams in this case,  is referred to as "Balance Weight" and is
>found as: (D-U)/2

Having just sent this out I noticed the above typo.  

Should have read:

Also, the 35 grams in this case,  is referred to as "Balance Weight" and is
found as: (D+U)/2

Sorry!

David Stanwood