I doubt computer fans are robust enough for combat.
I run 3 X 40mm heavy duty brushless fans on the Victors in P.I.T.A and another 2 in Pillow Torque.
The easy way to stop them breaking is to shock mount the fans on rubber bushes to the Victors using 2 screws only (as in P.I.T.A) or leave the fans on the Victors and shock mount the whole thing (as in Pillow torque) Both soloutions seem to work as since mounting them that way I havnt lost a single fan.