I just purchased a GENESIS E-310 NG BLK (2011-2012) used. I should have just spent the extra $100 on the propane grill from the other person selling one. I thought it was a simple change of orifices, and regulator, and i was all set. Now im reading more about the valves, id prefer to just switch it all out and be done. Id prefer to just trade Manifolds, but willing to purchase depending on the price.