I haven't tried pwm on other pins than the ones I am using, and the wires are soldered on now with heat shrink tubing, so I am not going to test if I can get it to work on other pins too. 
I haven't tried pwm on other pins than the ones I am using, and the wires are soldered on now with heat shrink tubing, so I am not going to test if I can get it to work on other pins too.