In response to your questions:
1) Me and able both don’t have experience with enemas so you asking the wrong people.
2) I wouldn’t worry about the leaky gut reactions too much because in time it will improve or heal. The more limiting your diet is, the more difficult it could be for you in the long term.
3) You can alter your diet if you wish, I personally healed from all of my leaky gut allergies in time. The only thing you should really worry about is how good or bad your digestion is and whether or not your body is absorbing the food. The other thing you should worry about is whether or not its on the food list and what health properties the food contains.