About this 3D model

I just combined this thing 4 times http://www.thingiverse.com/thing:22202 (schema/sketch by Danjhamer) I made it because i had the electronics. i used : 4 x 1K 4 x 10K (instead of 6.7K) 4 x 1N4004 diode 4 x IRF540 MOSFET 4 x 100µF Ceramic Capacitor All GND are linked and 12v too.