niftypkg - I glanced through the thread. It appears you still have the problem and kind of intermittent. We had a similar problem for a couple of years on our Dometic in a Starcraft pop-up. Fridge just wouldn't cool great when it got warmer outside. The flame wasn't the steadiest. We went through all the stuff and 11" of water column, replaced the regulator, cleaned the orifice and pan etc., did book maintenance, even had a tech look it over. Still the same old problem.
In the end it turned out to be a broken plastic knob on the controls where the knob fits the steel stud. The valve on the controls wasn't landing into the exact proper position "every" time the control was moved, so it was like the gas was only partially available.
Hope you can track it down. These kind of problems are really irritating.