Geeetech A10 Dual Fan Head Alternative

I came up with a dual cooling fan set up for the A10. I found some 12v 40mm box fans at a local store cheap so I went with those. Ive wired them in series as the output to the pwm fan is 24v.

Note that I struggled to get the stock fan to run under pwm control - it was either on 100% or off - no control. A fine fellow named combat341 on the geeetech a10 forum figured out that you must activate the following comment in the firmware: #define FAN_SOFT_PWM...take off the backslashes to make i