In February, I did the same thing. I have gone 100% over to the green coleman propane with the Great Northern Models adapter. I just dial in the propane needed on startup and those green propane bottles give lots and lots of great starts.

I know of at least three instances of on board propane lines that were under pressure igniting and flopping all around on fire.

I don't even use the onboard propane solenoid valve any more, I just hook a line direct to the engine and regulate it off the GNM valve. Perfect starts every time.

If you go the route I have gone, make sure you put a check valve on the line to the engine, you don't want heat coming up the line, it will fry the festo valve inside the engine.