Here's my pencil grip post -

http://giftedissues.davidsongifted....icker_training_for_pencil.html#Post80678

I also think adressing general hand - and core muscle - strength makes good sense - working with clay, gardening, sewing cards, maybe even Rubix cube type toys. Just think of all the things kids used to do with their hands a mere 50 years ago.

Good luck
Grinity

Coaching available, at SchoolSuccessSolutions.com