This project is an almost (99%) exact copy of the original product. The power supply implemented on the board will not be able to fully power 2 circuits of the type “Transistor array heater” (Portabellabs-like pA726). Therefore, you will have to look for the original UA726 or completely redo the power supply. I have a reliable contact in China that still has stocks of UA726 (Korea). If you decide to buy a set of boards from me, I will gladly provide you with the e-mail of my supplier.