PG and other top showcase events give the player/parents one tool in the evaluation of your son. Don't fixate too much on the grade and whether it predicts how well your son will play at the next level. Take this experience to see how other top players excel compared to son. Your son may be a top player on his high school team but compared to elite talent he may/may not stack up. If you choose to do multiple PG events use these grades to improve and show progress. A good grade will definitely help but not set in stone. My son as a jr received a PG grade of 8. Recruited and went to a D1 school. After 3 years with multiple accolades including POY, All Americans, etc. 1st round draft pick MLB. Don't let a score (good or bad) influence your ability at the next level. Instead use it to improve on those areas that lacking. Play as many showcase events and camps as you financially can. There is a tremendous amount of pressure the player experiences knowing they have to do well in a 1 or 2 day event. The more events they play in, the more they will get accustomed to the format and expectations, thus when the important big events come around, it will be nothing new and hopefully less pressure.