Dave,
I was there yesterday and saw Gregory’s accident. Kudo’s to the parents who raced out there and helped out in a flash. He’s a tough kid and will be back before you know it.
My son flipped his Jr1 this year in the first race. After the initial scare, he was ready to go again. Kids are much more resilient than us parents. My wife and I took a few more days to calm down.
My only advice, be very cautious with your engine now that it has been upside down. Drain and refill the oil, and check it about 25 times to make sure you have the proper amount in it. Ours blew the next day out after our acrobatic excursion.