If it helps, I have a B15 and carry 16 in the main compartment...3 Ridges, 3 Roc3s, 3 Teebirds, 2 Roadrunners, 3 Escapes, 2 Firebirds. That all fits snugly, but easy to pull a disc out. Even one more driver would probably make things a little tight and a pain to pull a disc out.