Kevin et all,
If you look at the picture, all of the weakest points of the foil are visible. The first problem is the pin that holds the u shaped strap bends because the fork is spread too wide. This causes the fork to spread more.
Eventually the pin bends enough that the fork sheers off the ring ding and the foil breaks. This wrecked one of my foils. I have been close to wrecking another. Replacing the pins every season or when ever they start to bend can prevent this. Alternatively you can use a bolt. Make sure the neck of the bold covers the fork. The threaded part is not strong enough for the load
The second trouble spot is the slotted fork itself. Twice I have broken the strap where it goes around the T weld. Once it destroyed the foil, once it was salvageable later.
Performance catamarans finally came up with a stronger strap that can be retrofitted to the boat. I think the dealers have them.

The other spot is the T weld I have observed at least 1 of these break. I never broke one myself.

Good Luck