Looks good, couple of thoughts, seems to be riding very bow proud, may be add some weight to the front or move things around to achieve a flatter plane angle or judging from your pics you have some upthrust on the motor, this would have the effect of pushing the stern down thus raising the bow, maybe remove this. Imay be wrong and welcome any corrections.
I do know the lads where i sail that have built airboats have all turned them over when trying tight turns flat out, and theirs are lower than yours.
hope this helps you get even more fun out it.