Brian, we have been fitting good junior players for 20 years and here are some guidlines for you.

The driver needs to be no more than 2-3 inches longer than their belly button.

they need to have at least 115 mph ball speed and be able to create launch…

Mike S said:

great thanks. to get this down to say D4 what would i have to do? would extra couple wraps of tape bring it down a bit??

The Winn Excel RF would make it D2-D3.  It would take 7 grams of grip tape to go from D6-D4 (this is using a swingweight…

Not everyone gets to test the golf balls.  I however, just received a package yesterday, so there is still hope for you!