Thought some might like a list of all the D formations you can select in custom playbooks.

3-3-5
Across
Bear
Okie
Split
Stack

3-4
Even
Normal
Over
Predator
Solid
Under

4-2-5
Across
Normal
Over
Under
Under Slide

4-3
Normal
Over
Under

4-4
Split

46
Bear

5-2
Normal

Dime
3-2-6
Normal

Nickle
1-5-5
1-5-5 Prowl
2-4-5
3-3-5
Normal
Strong

Quarter
3 Deep
Normal

Total: 32

so in other words, you can have EVERY Defense in one playbook (minus the play count)