Anyone have issues with this regulator? For the 2nd bake in a row, we've had an issue where there has been a steady decline in both flame and temp after the first bake of the night. Tonight (19º outside air temp...half a tank of Propane), 1st bake launch was at 933º after 15 minutes (1:30 bake time). Immediately after pulling that pizza, cranked the regulator (not the psi regulator) down just a hair to try and steady the temp at around 820ish for the 2nd bake. Ate the first pie and were ready to launch the 2nd about 15 min after taking out the first. Reading was 820º...perfect!!!? So turned it up full just before launch, and the flame didn't change. In fact, 5 minutes after pulling the 2nd pie (2:30 bake time), the temp of the bottom stone had dropped to 670º. We turned the whole thing off for about 15 minutes, then fired it up full bore for 15 minutes. At the start, the temp was 350º. Fifteen minutes down the line, 650º. twenty minutes, down to 620ish. Said screw it! and shut it down for the night. Seriously. LOVE this oven, but afraid it's just not quite ready for prime time. We've already had to replace the upper casing and platter, and now this. Anyone else have similar issues?