How Many More Brownie Tarts will I Make Before I Get the Perfect One?

This is take 2 and I’m almost there! I made it using a ready made pure butter shortcrust dough but i didn’t blind bake it. The brownie part was delicious but the crust didn’t really work for me! I’m working on my third attempt, do you think it will be the last? How many more brownie tarts will i make before i get the perfect one?