I know the sweetspot is at the center
of the racquet. But can somebody
sketch the sweetspot's exact location ?

Cos I had some difficulty to pinpoint
the sweetspot for my MP 88 @BG85-22lbs.

-----------
| |
| X |
| |
| |
-----------

What is the radius of X ?

If I string it at 20lbs, how much (%) more sweetspot
will i get ? 5%, 10% ???