Hello to everyone. I still have the honour to be the owner of astra H 2007 hatch. I want to retrofit front seats heating system. I do have front central grille and hazard panel with respective heating buttons. I want to fit an aftermarket seat heating syst keetec csh2. It claims to have everithing..pads..wires..buttons and sort of thermostat. Do i neex to buy original seats controller to fit aftermarket pads and wires? Where to find those controllers out of the original ones which costs quite alot after all these years. Many thanks for some tutorials or links where to buy.