Blackberry Custard Pie Bars

I was looking for something to use my home-grown blackberries in and found this recipe which I adapted to make GFCF.

http://www.gonnawantseconds.com/2014/06/blackberry-pie-bars/

Crust:
Pamela's - 1 1/2 Cups
Sugar - 3/4 Cup
3/4 cup coconut oil minus about 2 tablespoons
2 tablespoons water

Filling:
Large Eggs - 2 or 3
Sugar - 1 Cup
1/4 cup Pamela's
1/4 teaspoon vanilla
Fresh Blackberries - 16 Ounces (about 3 cups)

Preheat oven to 350 and line 8x8 pan with foil. Pulse the crust ingredients in food processor or mixer until it resembles coarse crumbs. Remove 3/4 cup of this mixture and reserve for crumb topping. Mix the filling ingredients except the blackberries. Press crust mixture into pan and bake for 12-15 minutes until lightly browned.

Place the berries on the partially cooled crust, then pour the filling mixture on top. Cover with reserved crumb topping mixture. Bake for 45-55 minutes, or until the filling is just beginning to turn golden and is set. Cool bars completely on a baking rack, then refrigerate if desired.

1.5x recipe for 9x13 pan:

2.25 cups pamela's
1.125 cups sugar
1 cup coconut oil
3 tbsp water

3 or 4 eggs
1.5 cup sugar
3/4 cup pamela's
3/8 tsp vanilla
4.5 cups berries