RE: scratch built smoke unit
djdezre - I just read a post in the German Forum (you should know the one I am referring to by now). The guy modified the HL unit to make it smoke better. He cut off the motor assembly, cut off the piston pump assembly, drilled a 9mm hole in the upper part of the smoke unit (remaining cube with the smoke unit inside) and then added a 25mmX25mm fan onto it. According to his post the unit smokes great now. I would think that if you wired the fan to the motors (assuming that the esc could handle the extra load) you could get it to blow smoke like the link I posted above. If you need direct links and pics email me and I'll send them too you.