No gas to cook top

I am just going to eat the cost. The sad thing about Dometic is the fact that CS folks there don't know what they are taking about and merely repeat the pap they have learned in CS instruction meetings. Worse than worthless — I am experienced enough to have known the signs but ignored them! Presently, I am in the process of installing it in the hope that something has been changed. Never did hear back from the manufacturer. Then I plan to inspect the regulator on the old one to see if it can be made adjustable. Eventually, the entire system will have to be evaluated. I am going to purchase a gauge to check WC and pressure. Any recommendations?