ALL of these mainboards will happily run on either 12 or 24v and they are all even labeled on the power input 12-24v. The issue with the voltage difference really is just a thing for the fans. While the heaters are labeled 12 and 24v they are controlled by a fully tunable PWM driver circuit known as a PID loop. and so we can have shorter less intensive pulses at 24v happily drive a 12v heater. and we can run 12v fans with a $2 ebay buck LM2596 step down converter. 12-24v is less of a problem than you could ever know.