RAB90,
Not sure what you mean by a high grade and "what to do with it". You don't really need to do much with a high grade, but maybe tell coaches that might not know. Sounds like the grade along with playing on a high level summer team should help you a lot.
More important than any grade is what you do the next time you take the field and every time after that.
calisportsfan,
I think sometimes people get grades or ratings mixed up with player rankings. To be ranked a player doesn't have to attend any showcases, we just need to see them play. To be graded we need to see a player in some type of a showcase or workout setting.
Tournaments/games do not always provide enough data in order to grade a player. Can't always get an exact reading on things like speed, fielding ability, power potential, etc. watching a game. The various skills are all much easier to evaluate at a showcase or workout.
That said we do see players that are definite 10 on PG scale at tounaments. In other words we have seen enough to know Byron Buxton (GA) is a 10. However he has never attended a PG showcase. We don't have him listed as a 10 but we have him ranked in the top 10 in the country. Guess you could say that would make him an easy 10 grade.