Fell for a dumb video saying how easy these were to convert. Bought a conversion kit and of course, it works…but only at super high temp even on low. It’s a nice grill and I’m too invested to turn back now. Do I need a replacement entire manifold? Or, can I get away with just swapping out the 3 burner valve controls. My grill is a 2015 SPIRIT S-315 NG SS US/CA.